(亦作 em-)
1
- (added to nouns) forming verbs meaning 'put into or on'加在名词前构成动词表示“置于…之中（或之上）”：
engulf
embed.
2
- (added to nouns and adjectives) forming verbs meaning 'bring into the condition of' (as in encrust )［加在名词和形容词前构成动词, 如encrust］表示“使处于…状态”。
2.1
- often forming verbs having the suffix -en (as in embolden, enliven )［常构成带有后缀- en的动词, 如 embolden, enliven］。
3
- (added to verbs) in; into; on加在动词之前表示“在…之中”, “到…之中”, “在…之上”：
ensnare.
3.1
- as an intensifier［用以加强语气］：
entangle.
词源
from French, from Latin in-. see IN-2 , a commonly found by-form.