1. 未弯曲的：unbending 坚决的 | unbent 未弯曲的 | unbiased 没有偏见的

2. 不弯的：unbend 卸除放直 | unbent 不弯的 | unberth passenger 统舱旅客

adj

1. erect in posture

e.g. sit straight
stood defiantly with unbowed back

Synonym: straightunbowed

2. not bent

e.g. looking for an unbent nail
trees with straight unbent trunks make the best lumber