Similar
来自Big Physics
late 16th century (also as a term in anatomy meaning ‘homogeneous’): from French similaire or medieval Latin similaris, from Latin similis ‘like’.
wiktionary
From French similaire, from Medieval Latin similaris, extended from Latin similis(“like”); akin to simul(“together”).
etymonline
similar (adj.)
"having characteristics in common," 1610s (earlier similary, 1560s), from French similaire, from a Medieval Latin extended form of Latin similis "like, resembling, of the same kind," from Old Latin semol "together" (from PIE root *sem- (1) "one; as one, together with"). The noun meaning "that which is similar" is from 1650s. Related: Similarly.
