-më (2) abstract suffix, as in melmë "love" (cf. the verb mel-), #cilmë "choice" (possibly implying a verb *cil- "to choose"). According to PE17:68, primitive -mē (and -wē) were endings used to derive nouns denoting "a single action", which may fit the meaning of cilmë (but melmë "love" would normally be something lasting rather than "a single action").
Quenya
meles
love
-më
suffix. abstract noun
melmë
love
melmë noun "love" (MEL)
meles, melessë noun "love" (LT1:262; rather melmë in Tolkien's later Quenya)