Kanji that use it

• 心

  heart, mind

• 必

  invariably, certain

• 芯

  wick

• 忍

  endure, bear

• 忌

  mourning, abhor

• 忘

  forget

• 志

  intention, plan

• 応

  apply, answer

• 泌

  ooze, flow

• 忠

  loyalty, fidelity

• 念

  wish, sense

• 怒

  angry, be offended

• 怠

  neglect, laziness

• 怨

  grudge, show resentment

• 急

  hurry, emergency

• 思

  think

• 恭

  respect, reverent

• 恥

  shame, dishonor

• 恐

  fear, dread

• 恋

  romance, in love

• 恵

  favor, blessing

• 恣

  selfish, arbitrary

• 秘

  secret, conceal

• 恩

  grace, kindness

• 息

  breath, respiration