This is the 10296th most frequent Japanese word.
頼
"頼" means "rely," "request," or "trust."
Here, the word 頼 is used in its verb form, 頼む (tanomu), meaning 'to request' or 'to ask for'. It indicates asking someone to do something.
彼に仕事を頼みました。
I requested him to take on a task.
In this sentence, 頼 is part of the phrase 頼りになる (tayori ni naru), meaning 'to be reliable'. It focuses on dependability or trust in something.
この道具は頼りになる。
This tool is reliable.
Here, 頼 appears in the phrase 頼みの綱 (tanomi no tsuna), which expresses 'a hope or a lifeline'. It is used metaphorically to describe reliance or hope placed in someone.