From Wiktionary, the free dictionary
From un- + siker.
unsiker (comparative more unsiker, superlative most unsiker)
- (obsolete) Unsafe, insecure.
- (obsolete) Uncertain, unreliable.
1485, Sir Thomas Malory, Le Morte Darthur, Book XVII:‘Also, Sir Launcelot, Sir Galahad prayde you to remembir of thys unsyker worlde, as ye behyght hym whan ye were togydirs more than halffe a yere.’
