disadvantage
n.
late 14c., disavauntage, from Old French desavantage (13c.), from des- (see dis-) + avantage (see advantage).
v.
1530s, from disadvantage, n.. Related: Disadvantaged; disadvantaging.
〔李〕[dis-=lack of 无；advantage n.有利条件→] n. lack of advantage；unfavorable condition 不利；不利条件