名詞 knowing:

1. a clear and certain mental apprehension

動詞 know:

1. be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
   同義詞：know, cognize, cognise
2. know how to do or perform something
   同義詞：know
3. be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
   同義詞：know
4. be familiar or acquainted with a person or an object
   同義詞：know
5. have firsthand knowledge of states, situations, emotions, or sensations
   同義詞：know, experience, live
6. accept (someone) to be what is claimed or accept his power and authority
   同義詞：acknowledge, recognize, recognise, know
7. have fixed in the mind
   同義詞：know
8. have sexual intercourse with
   同義詞：roll in the hay, love, make out, make love, sleep with, get laid, have sex, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk
9. know the nature or character of
   同義詞：know
10. be able to distinguish, recognize as being different
    同義詞：know
11. perceive as familiar
    同義詞：know

形容詞 knowing:

1. evidencing the possession of inside information
   同義詞：wise, wise to
2. by conscious design or purpose
   同義詞：deliberate, intentional
3. alert and fully informed
   同義詞：knowledgeable
4. highly educated; having extensive information or understanding
   同義詞：enlightened, knowledgeable, learned, lettered, well-educated, well-read

1. She held back, not knowing how to break the terrible news.
   她躊躇著，不知該怎樣宣布這一壞消息。
2. It's been really nice knowing you.
   認(rèn)識你真令人愉快。
3. Not knowing the road, the stranger went out of his way.
   這陌生人因不認(rèn)識路而走入歧途。
4. Though knowing the truth, he remained silent.
   雖然他知道實情，卻保持沉默。

know.ing

adj.（形容詞）
Possessing knowledge, information, or understanding.See Synonyms at intelligent
通曉的，有見識的：掌握知識或信息的，有理解力的參見 intelligent
Showing clever awareness and resourcefulness; shrewd.
聰明的，精明的：顯示出聰明的洞察力和智慧的；精明的
Suggestive of secret or private knowledge:
會心的，心照不宣的：暗示秘密或私人情況的：
例句：
a knowing glance.
會心的一瞥

Deliberate; conscious:
故意的；有意的：
例句：
a knowing attempt to defraud.
有意欺詐行為

【引伸】
know.ingly
adv.（副詞）
know.ingness
n.（名詞）