Grows, develops, or becomes very successful and healthy; flourishes and prospers.
From Old Norse 'thrīfa,' meaning to grasp or gain. The sense shifted to mean success and well-being, and thrives is the third-person singular present form.
Interestingly, thriving appears in both personal success and ecological science—a thriving ecosystem and a thriving person use the same word, showing how health and success are universal concepts.
Complete word intelligence in one call. Free tier — 50 lookups/day.