aestivis
aestivis is a Latin form of aestivus, meaning “of summer; (aestiva) summer camp”. It is the ablative plural masculine adjective.
Found 25 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 8.46.1: Ea re cognita Caesar, cum in omnibus partibus Galliae bene res geri videret iudicaretque superioribus aestivis Galliam devictam subactamque esse, Aquitaniam numquam adisset, per Publium Crassum quadam ex parte devicisset …
Suetonius, Divus Augustus 31.4: … ntare nisi cum aliquo maiore natu propinquorum. Compitales Lares ornari bis anno instituit uernis floribus et aestiuis.
All forms of aestivus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.