To Protect, To Defend, To Obey
transitive verb, godan verb
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means protect so the verb vocab version is to protect and also to defend. This can also mean to obey, in the sense of obeying the rules.
まもる
You need to protect against breast cancer, so you get yourself a mammogram (まも).
弟のことは俺がゼッタイ守るんで。
I'll definitely protect my little brother, no matter what.
コウイチの犬は、コウイチを危険から守りました。
Koichi's dog protected him from danger.
約束を守るのは社会人として当たり前のことです。
It is expected for working people to keep their promises.