obstinately determined to have one's own way

अपनी ही धुन में रहने वाला

English Usage: She has always been strongheaded about her career choices.

Hindi Usage: वह हमेशा अपने करियर के चयन में अपनी धुन पर चलती है।

the quality of being obstinately determined

जिद्दीपन

English Usage: His strongheadedness often leads to conflict with his team.

Hindi Usage: उसका ज़िद्दीपन अक्सर उसकी टीम के साथ विवादों का कारण बनता है।