This is the 147th most frequent Thai word.
โทร
"โทร" means "to call" or "to phone."
The word 'โทร' is a verb meaning 'to call' in the context of making a telephone call.
เธอโทรหาฉันเมื่อวานนี้
She called me yesterday.
Here, the word 'โทร' is used as a root in 'โทรศัพท์', signifying 'telephone' or 'phone'.
โทรศัพท์ของเขาเสียตอนเช้า
His phone broke in the morning.
Once again, 'โทร' is functioning as a verb meaning 'to make a call' or 'to dial' specifically through a phone.