N4
させられる
Verbs (Causative-passive voice), To be made to do something, To be forced to do
友達に冷たい水を浴びさせられるのが嫌いだ。
I hate being made to pour cold water over myself by my friends.
Explanation
The causative-passive 「〜させられる」 means 'to be made to do'. The subject did not want to, but had to, and feels put upon: 「私は母に部屋を掃除させられた」 (I was made to clean my room by my mother).
Forming it: for る-verbs replace 「る」 with 「させられる」 (食べる→食べさせられる); する→させられる, くる→こさせられる. For う-verbs it is the causative plus 「られる」 (書かせられる), but in practice it is usually shortened to 「〜される」: 書かされる, 飲まされる, 待たされる.
Mixed up with
Compare three sentences: 「母は私に部屋を掃除させた」 (Mother made me clean; focus on mother), 「私は犬に手を噛まれた」 (I got bitten by a dog; plain passive), 「私は母に部屋を掃除させられた」 (I was made to clean; focus on my reluctance).
Verbs ending in 「す」 cannot be shortened: only 「話させられる」.
In listening, tell 「書かれる」 (is written) from 「書かされる」 (is forced to write). The only difference is the extra 「さ」.