Middle English word -lich comes from Old English -lic, Old English -līc

Detailed word origin of -lich

Dictionary entry	Language	Definition
-lic	Old English (ang)	Forming adjectives denoting multiplicity (compare English -fold). Forming adjectives from nouns and adjectives with the sense of ‘characteristic of, pertaining to’.
-līc	Old English (ang)
-lik	Middle English (enm)

Words with the same origin as -lich