-some 1
a native English suffix formerly used in the formation of adjectives: quarrelsome; burdensome.
[ ME; OE -sum; akin to Goth -sama, G -sam; see SAME ]
-some 2
a collective suffix used with numerals: twosome; threesome.
[ ME -sum, OE sum; special use of SOME (pronoun) ]
-some 3
a combining form meaning "body," used in the formation of compound words: chromosome.
Also, -soma .
[ sôma body; see SOMA 1 ]