τηρέω (tereo): all forms
τηρέω means “watch over, guard, keep”. Below is its full conjugation in Ancient Greek.
Present active
Present active | Indicative | Subjunctive | Optative | Imperative |
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| 1st singular | τηρῶ | τηρῶ | τηροίην | |
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| 2nd singular | τηρεῖς | τηρῇς | τηροῖς · τηροίης | τήρει |
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| 3rd singular | τηρεῖ | τηρῇ | τηροίη | τηρείτω |
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| 1st plural | τηροῦμεν | τηρῶμεν | τηρεῖμεν · τήροιμεν · τηροίημεν | |
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| 2nd plural | τηρεῖτε | τηρῆτε | τηρεῖτε · τήροιτε · τηροίητε | τηρεῖτε |
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| 3rd plural | τηροῦσι(ν) | τηρῶσι(ν) | τηροῖεν · τηρεῖεν · τήροιεν · τηροίησαν | τηρείτων · τηρείτωσαν |
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Present middle/passive
Present middle/passive | Indicative | Subjunctive | Optative | Imperative |
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| 1st singular | τηροῦμαι | τηρῶμαι | τηροίμην | |
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| 2nd singular | τηρεῖ · τηρῇ | τηρῇ | τηροῖο | τηροῦ |
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| 3rd singular | τηρεῖται | τηρῆται | τηροῖτο | τηρείσθω |
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| 1st plural | τηρούμεθα | τηρώμεθα | τηροίμεθα | |
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| 2nd plural | τηρεῖσθε | τηρῆσθε | τηροῖσθε | τηρεῖσθε |
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| 3rd plural | τηροῦνται | τηρῶνται | τηροῖντο | τηρείσθων |
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Imperfect active
Imperfect active | Indicative |
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| 1st singular | ἐτήρουν |
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| 2nd singular | ἐτήρεις |
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| 3rd singular | ἐτήρει |
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| 1st plural | ἐτηροῦμεν |
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| 2nd plural | ἐτηρεῖτε |
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| 3rd plural | ἐτήρουν |
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Imperfect middle/passive
Imperfect middle/passive | Indicative |
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| 1st singular | ἐτηρούμην |
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| 2nd singular | ἐτηροῦ |
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| 3rd singular | ἐτηρεῖτο |
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| 1st plural | ἐτηρούμεθα |
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| 2nd plural | ἐτηρεῖσθε |
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| 3rd plural | ἐτηροῦντο |
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Infinitives
Infinitives | Active | Middle/passive |
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| Present | τηρεῖν | τηρεῖσθαι |
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Participles
Present active participle, singular | Masculine | Feminine | Neuter |
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| Nominative | τηρῶν | τηροῦσα | τηροῦν |
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| Genitive | τηροῦντος | τηρούσης | τηροῦντος |
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| Dative | τηροῦντι | τηρούσῃ | τηροῦντι |
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| Accusative | τηροῦντα | τηροῦσαν | τηροῦν |
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| Vocative | τηροῦν | τηροῦσα | τηροῦν |
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Present active participle, plural | Masculine | Feminine | Neuter |
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| Nominative | τηροῦντες | τηροῦσαι | τηροῦντα |
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| Genitive | τηρούντων | τηρουσῶν | τηρούντων |
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| Dative | τηροῦσι(ν) | τηρούσαις | τηροῦσι(ν) |
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| Accusative | τηροῦντας | τηρούσας | τηροῦντα |
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| Vocative | τηροῦντες | τηροῦσαι | τηροῦντα |
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Present middle/passive participle, singular | Masculine | Feminine | Neuter |
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| Nominative | τηρούμενος | τηρουμένη | τηρούμενον |
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| Genitive | τηρουμένου | τηρουμένης | τηρουμένου |
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| Dative | τηρουμένῳ | τηρουμένῃ | τηρουμένῳ |
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| Accusative | τηρούμενον | τηρουμένην | τηρούμενον |
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| Vocative | τηρούμενε | τηρουμένη | τηρούμενον |
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Present middle/passive participle, plural | Masculine | Feminine | Neuter |
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| Nominative | τηρούμενοι | τηρούμεναι | τηρούμενα |
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| Genitive | τηρουμένων | τηρουμένων | τηρουμένων |
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| Dative | τηρουμένοις | τηρουμέναις | τηρουμένοις |
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| Accusative | τηρουμένους | τηρουμένας | τηρούμενα |
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| Vocative | τηρούμενοι | τηρούμεναι | τηρούμενα |
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Meaning and examples of τηρέω
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.