Webster's Revised Unabridged Dictionary · 1913

Imbosk

Imbosk , transitive verb

[CF. Italian imboscare to imbosk, imboscarsi to retire into a wood; pref. im- in + bosco wood. See Boscage, and compare Ambush.]

To conceal, as in bushes; to hide. [Obsolete] — Shelton

Imbosk , intransitive verb

To be concealed. [Rare] — Milton