頑張って

kuʁaʒ tjɛ̃ bɔ̃ byt nɒt ɛ̃tɛʁʃɑ̃ʒabl ɪn ɔːl sityasjɔ̃

In French Courage! / Tiens bon! (but not interchangeable in all situations)

A phrase of encouragement, urging someone to do their best and not give up, often used when someone is facing a challenge.