-some1
/səm/suffix
Forming adjectives meaning.
1Productive of: loathsome
2Characterized by being: wholesome
2.1Apt to: tiresome
Origin
Old English -sum.
-some2
/səm/suffix
(Forming nouns) denoting a group of a specified number: foursome
Origin
Old English sum 'some'.
-some3
/səʊm/combiningForm
Denoting a portion of a body, especially a particle of a cell: chromosome
Origin
From Greek sōma 'body'.