To ingratiate oneself with someone, often for personal gain.

To become close or friendly with someone.

किसी के साथ नजदीक या मित्रवत होना।

English Usage: They began to cotton up during their trip to the countryside.

Hindi Usage: वे अपने ग्रामीण यात्रा के दौरान नजदीक होने लगे।