icebound[
'aisbaund]
a. 
封
icebound[ adj ]locked in by ice<adj.all> icebound harbors
Icebound \Ice"bound`\, a.
Totally surrounded with ice, so as to be incapable of
advancing; as, an icebound vessel; also, surrounded by or
fringed with ice so as to hinder easy access; as, an icebound
coast.