"expedient" in the noun sense
1. expedient
a means to an end not necessarily a principled or ethical one
"expedient" in the adjective sense
1. expedient
serving to promote your interest
"was merciful only when mercy was expedient"
2. expedient
appropriate to a purpose practical
"in the circumstances it was expedient to express loyalty"
Source: WordNet® (An amazing lexical database of English)
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