1387, "not owing or payable," from un- (1) "not" + pp. of due. Formed on model of O.Fr. indeu, L. indebitus. Meaning "not appropriate, unseasonable" is recorded from 1398. Sense of "unjustifiable" is attested from 1399 (implied in unduly). Meaning "excessive" is first recorded 1684.
Main Entry: un·due Pronunciation: "&n-'dü, -'dyü Function: adjective 1: not due : not yet payable undue bill> 2: exceeding or violating propriety or fitness undue hardship on the debtors> undue burden on employers>
[uhn-doo, -dyoo] 
