A person who is invited to visit or stay in someone's home.

A customer at a hotel or restaurant.

ग्राहक

English Usage: The hotel is fully booked with no available guests.

Hindi Usage: होटल पूरी तरह से भरा हुआ है, कोई ग्राहक नहीं है।

To make a guest or host.

To speculate or estimate.

अनुमान लगाना

English Usage: I can only guest the reason for his absence.

Hindi Usage: मैं केवल उसके अनुपस्थिति का अनुमान लगा सकता हूँ।