FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

oiomai οἴομαι οἶμαι — oy'-om-ahee} 或 (缩简型) oimai {oy'-mahee — oimai oy'-mahee middle voice apparently from 3634; to make like (oneself), i.e. imagine (be of the opinion):--suppose, think.

see GREEK for 3634