■ suffix
1》 (forming adjectives from nouns) full of; having the qualities of: sorrowful.
2》 forming adjectives from adjectives or from Latin stems with little change of sense: grateful.
3》 (forming adjectives from verbs) apt to; able to; accustomed to: forgetful.
4》 ( plural ~s ) forming nouns denoting the amount needed to fill the specified container: bucketful.