馬勒 is read as ばろく (baroku) and means bridle.
ばろく
baroku
うまぬし
owner of a horse (esp. racehorse)
うま
horse
ばしゃ
coach (horse-drawn)
ばか
Mactra chinensis (species of trough shell)
ばりき
horse-drawn cart
ばじゅつ
horsemanship
ばば
riding ground
ばからしい
absurd
ばけん
betting ticket
ばしん
horse's length
ばじょう
(on) horseback
めず
horse-headed demon (in hell)