Manful
/ˈmænfl/
Definition 1 of 1
Pro Tip 1/3Traditional Masculinity
Often refers to qualities like strength associated with traditional male roles. 
His manful disposition was admired by his teammates.
Pro Tip 2/3Positive Connotation
'Manful' is usually positive, indicating approval of someone's determined or brave actions. 
The firefighter's manful action saved lives.
Pro Tip 3/3Seldom Used
It's an uncommon word, so using it may make language seem dated or formal. 
His speech was filled with archaic words like 'manful.'