The origin of Proto-MSA *lhm/*lḥm ‘to touch’ is uncertain and it is even hard to say which of the two variants is primary from the etymological point of view. For *lḥm, cf. perhaps Syr.
lḥm ‘aptus fuit; se applicavit; minatus est,’ (pa.) ‘conjunxit’, Arb.
lḥm (VI) ‘to be joined, knit together’, Gez.
ˀalḥama ‘to close, to glue’, Tgr.
ˀalḥamä ‘to glue,’