CHA-4

('cha' in the fourth tone)

There are some 37 standard Chinese characters that are pronounced 'cha'. The most common is: 查 = cha(2) = to check. 查 is also the sound-indicating component in eight other characters spoken as 'cha'.  Six other characters spoken as 'cha' incorporate the character 宅 , apart from a radical, even though 宅 itself is not spoken 'cha'. 宅 = zhai(2) = residence

差 = to differ

差点 = cha(4)dian(3) = almost