• Basic forms
• 割る — break; split; divide / base form
• 割ります — breaks; splits / masu form
• 割った — broke; split / ta form
• 割って — breaking … / te form
• 割らない — do not break / negative
• 割れば — if (one) breaks / conditional
• Common expressions
• 卵を割る — crack an egg
• ガラスを割る — break glass
• 費用を割る — split the cost
• More
• 割られる — be broken; be split / passive
• 割っている — is breaking; has broken / state

割る（わる） is a godan transitive verb. It is used for breaking or splitting something, and also for dividing things like costs or shares.

• Basic forms
• 割く — tear; split; spare (time) / base form
• 割きます — tears; spares / masu form
• 割いた — tore; spared / ta form
• 割いて — tearing … / te form
• 割かない — do not tear / negative
• 割けば — if (one) tears / conditional
• Common expressions
• 紙を割く — tear paper
• 時間を割く — spare time
• 注意を割く — devote attention
• More
• 割かれる — be torn; be spared / passive
• 割いている — is tearing; is sparing / state

割く（さく） is a godan transitive verb. It means to tear something on purpose, and it is also used figuratively for sparing time or attention.