This is the 5313th most frequent Turkish word.
katılmama
"Katılmama" means "non-participation" or "not joining."
Here, "katılmama" is used as a noun to express the act of not attending or participating, derived from the verb "katılmak" (to join/attend) and the negative suffix "-ma."
Toplantıya katılmama kararı aldım.
I decided not to attend the meeting.
In this sentence, "katılmamama" is a form of expressing disagreement, modified by negating "katılma" (agreement) with suffixes indicating possession and a relational clause.
Arkadaşımın fikrine tamamen katılmamama rağmen saygı duyuyorum.
Even though I do not completely agree with my friend's opinion, I respect it.
The phrase "katılmama" reflects the possibility or act of not participating or attending, emphasizing the lack thereof in the given context.