No it isn't. You can find self and fish in it, but they share the letter f, so it is not a compound word. The words would have to be completely different without sharing the same letter. Shellfish would be a compound because it has Shell and Fish, with no overlap of letters.
Selfish is an adjective.
A selfish person is only interested in what benefits them, A word that means the opposite of selfish is, giver.
The opposite of the word 'selfish' is 'self-sacrificing'.
One possible prefix for "selfish" is "un-", which would create the word "unselfish," meaning not selfish.
The comparative form is more selfish. The superlative form is most selfish.
The abstract noun for "selfish" is selfishness.
Another word for remarkable is outstanding. Selfish does not describe something that is remarkable, selfish describes someone who only thinks of their self.
Selfish ,
Self-centered or egocentric may be stronger alternatives for selfish.
selfish
SELFISH
No, building is not a compound word.