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self·ish·ly | \ ˈsel-fish-lē 
\
\Definition of selfishly
: in a selfish way
acting/behaving selfishly … he selfishly hogged attention for his injury …— Louise Erdrich He finds support for his intuition from game theory, which says that if everyone in a game acts selfishly, everyone suffers.— Gina Kolata
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Time Traveler for selfishly
The first known use of selfishly was in 1645
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