Denotes causing someone to do something. not to be confused with the volitional form (〜oう) To be used with transitive verbs.
Allowed to (...)
With the に particle, denotes that the do-er is willing i.e they are allowed to do something
先生は生徒==に歩かせた== The teacher let the students walk.
子供に運動をさせる To let the children do exercise.
先生は生徒に歩かせた Teacher allowed the children to walk.
Using the auxiliary verbs あげる or くれるwith the causative form almost always implies letting someone do (...), and not forcing.
全部食べさせてくれた Giving someone the favour of) letting someone eat it all
今日は仕事をやむせてくれる Please let me rest from work today.
Forced to (...)
the を particle denotes that the do-er is unwilling, i.e. they are forced to do something.
先生は生徒==を歩かせた== The teacher forced the students to walk.
赤ちゃんを寝させる To make the baby go to bed.
漢字をたくさん書かせられる I am forced to write kanji a lot
Ahww yiss let's combine them all together! potential, causative, formal, past!
食べさせられませんでした Could not be forced to make eat (something)
abbreviation
In abbreviation, contracted to ～aす. For 一段、 さす
何時ことを何回も言わすな Don't make me say the same thing over and over again! (slang)
お腹が空いているんだから、なんか食べさしてくれよ！ I'm starving, so let me eat something!