· straighten up or out; make straight

Synonym(s): straighten

Hypernym(s): change_posture

· unfasten, as a sail, from a spar or a stay

Hypernym(s): unfasten

· free from flexure; "unbend a bow"

Hypernym(s): straighten, straighten_out

Antonym(s): bend

· make less taut; "relax the tension on the rope"

Synonym(s): relax

Hypernym(s): loosen, loose

· become less tense, rest, or take one's ease; "He relaxed in the hot tub"; "Let's all relax after a hard day's work"

Synonym(s): relax, loosen_up, unwind, decompress, slow_down

Hypernym(s): change_state, turn

· release from mental strain, tension, or formality; "unbend the mind from absorbing too much information"

Hypernym(s): relax, unstrain, unlax, loosen_up, unwind, make_relaxed

· not bent; "looking for an unbent nail"; "trees with straight unbent trunks make the best lumber"

· erect in posture; "sit straight"; "stood defiantly with unbowed back"

Synonym(s): straight, unbowed