Etymology
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indefensible (adj.)
1520s, "that cannot be maintained or justified by argument," from in- (1) "not, opposite of" + defensible. From 1560s as "that cannot be maintained by force." Related: Indefensibly.
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untenable (adj.)
1640s, "indefensible, incapable of being held against attack," from un- (1) "not" + tenable (adj.). Figurative sense is recorded from 1690s.
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analyse (v.)

chiefly British English spelling of analyze (q.v.), which was the former spelling there (as in Johnson's dictionary). In 17c. analize also was used.

Analyse is better than analyze, but merely as being the one of the two equally indefensible forms that has won. The correct but now impossible form would be analysize (or analysise), with analysist for existing analyst. [Fowler]
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