Word Origin & History
aptlate 14c., "suited, fitted, adapted," from L. aptus "fit, suited," pp. of *apere "to attach, join, tie to," from PIE base *ap- "to grasp, take, reach" (cf. Skt. apnoti "he reaches," L. apisci "to reach after, attain," Hitt. epmi "I seize"). Elliptical sense of "becoming, appropriate" is from 1560s; sense
EXPANDof "habitually liable" is from 1520s.
COLLAPSE