Vocabulary

ਪਿਆ
peya

fell (into). 'Peya pyaar' = fell in love. From paina (to fall).

verb
In this song
Luv N Luv · Navaan Sandhu
Chorus
ਪਿਆ ਜਿਸ ਦਿਨ ਦਾ ਤੇਰੇ ਨਾਲ ਪਿਆਰ ਨੀ
Peya jis din da tere naal pyaar ni
Since the day he fell in love with you, girl