other half

US /ˈʌðər hæf/
UK /ˈʌðər hæf/
"other half" picture
1.

a person's husband, wife, or partner

:
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I'm going to the party with my other half.
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He always consults his other half before making big decisions.
:
half-and-halfhalfit's six of one and half a dozen of the otherotherothersotheringhalf-brother