unsetting

I. \\|ən+\ adjective

Etymology: un- (I) + setting, present participle of set

: not setting

where suns unsetting light the sky and flowers and fruit abound — J.H.Newman

II. noun

Etymology: un- (I) + setting, n.

: a supporting of the opposite masonry walls of a cut through loose strata by means of buttresses resting on inverted arches