What is the meaning of kikuyu word thonjo?

"Thonjo" is not a Kikuyu word. It's possible you're thinking of a different word, or the word you're looking for has a slightly different spelling.

To help me find the right answer, could you please provide some context?

For example:

* What is the word used for? (e.g., to describe an object, a feeling, an action)

* In what context did you hear or read this word? (e.g., a conversation, a book, a song)

With more information, I can better understand what you're looking for and give you a more accurate answer.