Quenya 

ap-

touch (one)

#ap- (cited in the form apë, evidently the 3rd person aorist) vb. "touch (one)" in the figurative sense; "concern, affect" (VT44:26)

ap-

verb. to touch one, concern, affect

appa-

touch

appa- vb. "touch" (in the literal sense; contrast #ap-, q.v.) (VT44:26)