Definition of -ious in English:

-ious

Pronunciation: /ɪəs, əs/

suffix

(Forming adjectives) characterized by; full of: cautious vivacious

Origin

from French -ieux, from Latin -iosus.

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Word of the day middlescent
Pronunciation: ˌmɪdəˈlɛs(ə)nt
adjective
middle-aged, but still maintaining youthful interests and activities