Here's how it breaks down:
1. "Thavidu" as a verb: It usually translates to "to be firm" or "to be strong."
Example: "Thavidu irunthu" means "to be firm/strong in something."
2. "Thavidu" as part of a phrase: It could mean "to hold onto" or "to be attached to".
Example: "Thavidu pidippathu" means "to hold onto something tightly."
To get a more accurate translation, please provide the full phrase or sentence where "Thavidu" is used.
Let me know, and I can help you find the most suitable English equivalent.