後綴-ful

漢：形容詞和名詞後綴，形容詞後綴-ful意爲"full of,having the quality of"。多加在名詞之後表示“充滿...的、易於...、可...的、富有...的、具有...的”的意思，是最常用的形容詞後綴，反義詞後綴是-less；此外，加在名詞

之後，表示充滿的量。
英：word-forming element meaning "full of, characterized by," Old English -full, -ful, suffix use of full (adj.).

-fula
suffix meaning “full of,” “characterized by” ( shameful; beautiful; careful; thoughtful ); “tending to,” “able to” ( wakeful; harmful ); “as much as will fill” ( spoonful ).

Origin:
Middle English, Old English -full, -ful, representing full, ful full1

Usage note
The plurals of nouns ending in -ful are usually formed by adding -s to the suffix: two cupfuls; two scant teaspoonfuls. Perhaps influenced by the phrase in which a noun is followed by the adjective full

( both arms full of packages ), some speakers and writers pluralize such nouns by adding -s before the suffix: two cupsful.

World English Dictionary
-ful
— suffix
1. ( forming adjectives ) full of or characterized by: painful ; spiteful ; restful
2. ( forming adjectives ) able or tending to: helpful ; useful
3. ( forming nouns ) indicating as much as will fill the thing specified: mouthful ; spoonful
usage
Where the amount held by a spoon, etc, is used as a rough unit of measurement, the correct form is spoonful , etc: take a spoonful of this medicine every day . Spoon full is used in a sentence such as he

held out a spoon full of dark liquid , where full of describes the spoon. A plural form such as spoonfuls is preferred by many speakers and writers to spoonsful

Medical Dictionary
-ics suff.
Science; art; study; knowledge; skill: pharmaceutics.
Actions, activities, or practices of: macrobiotics.