mirthful
Meaning
full of mirth; merry or amusing.
Structure
Usage
his mirthful laughter echoed through the hall.
she had a bright, mirthful expression that was contagious.
the comedian's mirthful anecdotes kept the audience entertained.
Etymology
the word 'mirthful' is a compound formed from two old english elements. the root 'mirth' descends from the old english myrgþ, which itself evolved from the proto-germanic murgiþō, conveying a sense of joy, pleasure, or gladness. this is cognate with old norse myrgð and is related to the old english adjective myrge, meaning 'pleasant'. the suffix '-ful' is the modern form of the old english adjectival suffix -ful, meaning 'full of' or 'characterized by'. thus, the literal construction 'full of mirth' directly and transparently yields the modern meaning of being merry, joyful, or inclined to laughter.
Analysis
mirth (from old english myrgþ, meaning joy, pleasure, of germanic origin) + ful (from old english -ful, an adjective-forming suffix meaning 'full of').