tough guy; fearless fighter; wild one
Refers to a strong, brave, or reckless person, often with a rough or wild image. Can be used admiringly or critically.
He was known as a fearless fighter on the battlefield.
He is known as a fearsome veteran in the judo world.
That new employee is quite a tough guy.
Tough fighters gather at this dojo from all over the country.
This team is full of fearsome veterans, so no one can afford to let their guard down.
弱者 refers to a weak or vulnerable person, the opposite of the fearless, tough 猛者.
Standard kanji spelling.
The kanji 猛 means 'fierce' or 'wild', and 者 means 'person'. The reading もさ is a standard on'yomi combination. The obsolete reading もうざ reflects an older pronunciation.