"दादा खेल सकते हैं ।"

Translation: Grandfather can play.

[DeniMo6]

I believe that with older male family members, the plural form of the verbs is used as a polite/honorific form.

[yxnGJDdi]

That is what I have read too.

[Zafarnama]

I'm confused, why isn't it "sakata" instead of "sakatay"?

[shrikrishna1]

read the above comments. Elderly persons are addressed in plural form