flatten

动词 flatten:

1. make flat or flatter
2. become flat or flatter
   同义词：flatten out
3. lower the pitch of (musical notes)
   同义词：drop

1. Flatten the dough with a press of the hand.
   用手把生面团压平。
2. The graph flattens out gradually after a steep fall.
   图表上的曲线突降之後逐渐趋於平稳。
3. The land flattens out near the coast.
   海岸附近地势变得很平坦。
4. He was totally flattened by her sarcasm.
   她说的挖苦话使他无地自容。

flat.ten

v.（动词）
flat.tened,flat.ten.ing,flat.tens
v.tr.（及物动词）
To make flat or flatter.
把…弄平：使变平或变得更平
To knock down; lay low:
击倒；把…放低：
例句：
The boxer was flattened with one punch.
那个拳击手被一拳击倒了

v.intr.（不及物动词）
To become flat or flatter.
变平或变得更平

【引伸】
flat.tener
n.（名词）