infectious laughter
- noun
- /ɪnˈfɛkʃəs ˈlæftər/
- By her infectious laughter.
Examples
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The child's infectious laughter was so delightful that it made even the grumpiest adults laugh along.
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He makes this point by including the infectious laughter of his son, Elan.
Blog text (23) -
Just that Pinkie Pie's known all over the Kingdom of Equestria for her mad-infectious laughter.
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Her infectious laughter filled the entire room, making everyone around her smile and join in.
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Whenever he tells a joke, his infectious laughter spreads through the crowd, causing a ripple of giggles.
Synonyms
A laugh that makes other people start laughing too
Antonyms
How Infectious
Surface Forms
Morphology
The meaning 'laughter that spreads and makes others laugh' is directly and predictably derived from combining 'infectious' (spreads easily by influence) with 'laughter' (the sound of laughing). This adjective+noun composition and the metaphorical use of 'infectious' for emotions is common cross-linguistically, so a B1 learner who knows both constituents will readily infer the MWE's meaning.
Etymology
Infectious laughter comes from the image of a laugh spreading like a small illness: the word infectious suggests something that 'spreads' and laughter that people 'catch' from each other. So it means laughter so joyful it easily makes other people laugh.