infectious
Translation
infectious, contagious, catching
Examples
Flu is a highly infectious disease.
Flu is a highly infectious disease.
Her laughter is infectious.
Her laughter is infectious.
Grammar Patterns
((an)) infectious ((disease)) an illness that can be passed to other people. Flu is an infectious disease.
((an)) infectious ((feeling)) a feeling that spreads to other people. Her laughter is infectious.
Similar Words
Synonyms: contagious, communicable; Antonyms: non-infectious
Etymology
From the noun 'infection' plus the adjective-forming suffix '-ous', meaning 'having the quality of'.
Memory Tips
Something that is infecti-OUS can cause an infection in US. Also used for emotions that spread easily.