I. “+ adjective
Etymology: un- (I) + bending, present participle of bend
1. : not bending : unyielding
the unbending , wind-swept ruggedness of that tree — H.A.Overstreet
2.
a. : not given to altering a purpose or opinion : resolute , inflexible
a man of violent temper, stern and unbending in the performance of what he considers to be his duty — C.B.Nordhoff & J.N.Hall
b. : that does not unbend : cool, aloof, or unsocial in manner or mien : reserved
• un·bend·ing·ly adverb
• un·bend·ing·ness noun -es
II. adjective
Etymology: from present participle of unbend
: that unbends : given to relaxation