Theatre
来自Big Physics
late Middle English: from Old French, or from Latin theatrum, from Greek theatron, from theasthai ‘behold’.
wiktionary
From Middle English theater, theatre, from Old French theatre, from Latin theatrum, from Ancient Greek θέατρον(théatron, “a place for viewing”), from θεάομαι(theáomai, “to see", "to watch", "to observe”).
etymonline
theatre (n.)
chiefly British English spelling of theater (q.v.); for spelling, see -re.
