Vocabulary

ਸਿਖਾ
sikha

teach (imperative/causative of sikhna = to learn)

verb
In this song
Sadi Sun · Harsh Nussi
Verse 3
ਸਾਨੂੰ ਖੁਸ਼ ਜਿਹਾ ਰਹਿਣਾ ਤੂੰ ਸਿਖਾ ਤੇ ਸਹੀ
saanu khush jeha rehna tu sikha te sahi
At least teach me what it's like to be happy