Vocabulary

ਹੋਣੈ
honai

must be, probably is (presumptive)

verb
In this song
Patiala Peg · Diljit Dosanjh
Verse 1
ਓਹ ਤੂੰ ਤੇ ਆਖਿਆ, ਭੁੱਲ ਗਿਆ ਹੋਣੈ
oh tu te aakhya, bhull gya honai
She goes, 'He must've forgotten me by now'