動詞 become:

1. enter or assume a certain state or condition
   同義詞：become, go, get
2. undergo a change or development
   同義詞：become, turn
3. come into existence
   同義詞：become
4. enhance the appearance of
   同義詞：become, suit

形容詞 becoming:

1. according with custom or propriety
   同義詞：comely, comme il faut, decent, decorous, seemly
2. displaying or setting off to best advantage

1. The anti-nuclear lobby is becoming stronger.
   向議員游說的反核群眾聲勢漸強。
2. This slave dreamed of becoming a freeman.
   這個奴隸夢想著成為一個自由人。
3. I hope his dream of becoming a pianist will come true.
   我希望他成為鋼琴家的夢想可以成真。
4. He dreamed of becoming a townsman.
   他夢想著成為一名城里人。
5. His dream of becoming an artist has been fulfilled.
   他成為一個藝術家的夢想實現了。
6. She has bent on becoming an actress.
   她決心成為一名女演員。
7. Blue always looks very becoming on her.
   她穿藍色的服裝總是很合適的。
8. Blue is a very becoming color on me.
   我穿藍色衣服非常適合。

be.com.ing

adj.（形容詞）
Appropriate, suitable, or proper.
適當的、合適的或相當的
Pleasing or attractive to the eye.
好看的：令人高興的或引人注目的

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