-some

-some
suff 後缀
1 (with ns and vs forming adjs 与名词和动词构成形容词) producing; likely to 引起...的; 有...倾向的: fearsome
    quarrelsome * meddlesome.
2 (with numbers forming ns 与数词构成名词) group of the specified number 某数目的一组: threesome.

牛津英汉双解词典