その馬は倒れたときに首を折ってしまった。

that (something or someone distant from the speaker, close to the listener; actions of the listener, or ideas expressed or understood by the listener); the; um...; er...; uh...

horse; promoted bishop

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

to fall; to collapse; to drop; to fall senseless; to be forced to bed (by illness, etc.); to die; to go bankrupt; to be ruined; to have a bad debt; to be defeated (in a game); to fall (of governments, dictators, etc.)

by the way; incidentally; sometimes; occasionally

neck; head; dismissal; discharge; firing (from a job)

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to break; to fracture; to break off; to snap off; to pick (e.g. flowers); to fold; to bend; to make (origami); to interrupt; to end