siem

siem is a Latin form of sum, meaning “be, exist; (as auxiliary) is, are, was”. It is the 1st person singular present active subjunctive.

Found 30 times in the Latin texts on Socratos.

Where it is used

Terence, Andria 3.4.586b: Tandem cognosti qui siem?

All forms of sum (conjugation 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.