This is the 12743rd most frequent Turkish word.
istemedikleri
"Things they do not want."
Here, 'istemedikleri' is used to describe objects or things that 'they' do not want, functioning as a relative clause in Turkish.
Onlara istemedikleri şeyleri zorla vermeyin.
Do not forcefully give them things they don't want.
In this sentence, 'istemedikleri' qualifies the 'conversations,' referring to those that 'his/her friends' do not wish to have, showing a similar possessive-relative clause usage.
Arkadaşlarının istemedikleri konuşmaları yapmamaya özen gösterdi.
He/she made an effort not to engage in conversations that his/her friends did not want.
Here, 'istemedikleri' describes individuals, indicating that 'they' prefer not to work with those people, showcasing its descriptive aspect in qualifying nouns.