1. 名詞
   不可數名詞: 小心
   謹慎
   可為可數與不可數名詞/
   複數為"cautions":
   警告, 告誡
   限定單數可數名詞a caution:
   令人發笑的人
   令人發笑之物
   令人發笑的東西
   發噱的事
   

   同義字詞
   alertness,care,carefulness,cautiousness,chariness,circumspection,gingerliness,guardedness,heedfulness,prudence,wariness
   flash,marvel,miracle,phenomenon,portent,prodigy,sensation,splendor,wonder
   tip-off,tocsin,wake-up call,warning
   admonishment,admonition,alarm,alarum,alert,forewarning,heads-up,notice,warning
   fail-safe,palladium,precaution,preventive,safeguard
   

2. 動詞
   及物動詞:
   警告...(人)
   告誡...(人)
   使...(人)小心
   caution against ...(物):
   警告大家不要用...
   告誡大家不要用...
   caution against ...(事):
   提醒大家不要有...
   caution ...(a: 人) against ...(b: 物):
   

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   同義字詞
   advise,alert,forewarn,wake,warn
   

3. 動詞片語連結
   (人)exercise caution:
   謹慎行事
   小心謹慎
   提高警覺
   (人)exercise more caution:
   更加謹慎行事
   更加小心謹慎
   更提高警覺
   

例句

1. Some must be treated with caution .
2. Caution mode, the opposite, is wary.
3. Caution : Wood dowels can not get wet.
4. So obviously, this calls for caution .
5. One word of caution about moto drivers.
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