the whole body; all over the body
Literal sense referring to the entire physical body. Often used in set phrases like 満身の力 (with all one's strength) or 満身創痍 (covered in wounds).
He pushed the rock with all his strength.
noun which may take the genitive case particle 'no'
all one's (strength, anger, spirit, etc.); full of
Figurative use as a no-adjective, emphasizing that one's entire being is filled with a particular emotion or quality. Common with nouns like 怒り (anger), 喜び (joy), or 力 (strength).
He protested with all his anger.
She received the news with great joy.
covered in wounds; wounded all over · heavily criticized; taking a beating (figuratively)
Compound of 満 (full, whole) and 身 (body). The figurative extension to emotions and abstract qualities is a natural semantic broadening.