1.
suffix forming adjectives meaning:
1. adapted to; productive of (cuddlesome; fearsome).
2 characterized by being (fulsome; lithesome).
3 apt to (tiresome; meddlesome).
Etymology: OE -sum 2.
suffix forming nouns from numerals, meaning 'a group of (so many)' (foursome).
Etymology: OE sum SOME, used after numerals in genit. pl. 3.
comb. form denoting a portion of a body, esp. of a cell (chromosome; ribosome).
Etymology: Gk soma body