車が故障したので、歩かねばならなかった。

The car broke down, so that we had to walk.

車(くるま)が故障(こしょう)したので、歩(ある)かねばならなかった。

Kuruma ga koshōshita node, arukanebanaranakatta.

車 (くるま)

car; automobile; vehicle; wheel

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

故障 (こしょう)

breakdown; failure; fault; accident; out of order; damage; hurt; objection; protest

ので (ので、んで)

that being the case; because of ...; the reason is ....; given that...

歩く (あるく)

to walk

Readings: シャ、くるま

Meaning: car

Readings: コ、ゆえ、ふる.い、もと

Meanings: happenstance, especially, intentionally, reason, cause, circumstances, the late, therefore, consequently

Readings: ショウ、さわ.る

Meanings: hinder, hurt, harm

Readings: ホ、ブ、フ、ある.く、あゆ.む

Meanings: walk, counter for steps