egoistic

adjective

ego·​is·​tic

-gō¦is-, 

-tēk

variants or less commonly egoistical

-tə̇kəl 

-tēk-

1

: egocentric, egotistic

2

: of or relating to the ego or egoism

the interior egoistic relations of a single subject

—James Martineau

an egoistic interpretation of social behavior, a denial of the existence of altruistic conduct

—F. W. Znaniecki

egoistically

-tə̇k(ə)lē 

-tēk-, 

-li

adverb

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