Webster's Revised Unabridged Dictionary · 1913

Unclasp

Unclasp (un*klȧsp") , transitive verb

[1st pref. un- + clasp.]

To loose the clasp of; to open, as something that is fastened with, or as with, a clasp; as, to unclasp a book; to unclasp the hands; to unclasp one's heart.