intransitive verb thrived or throve, thrived or thriven thriv′en (t̸hriv′'n), thriving thriv′·ing

1. to prosper or flourish; be successful, esp. as the result of economical management
2. to grow vigorously or luxuriantly; improve physically

Etymology: ME thrifen < ON thrifast, to prosper, reflex. of thrifa, to grasp