-eous
an adjectival suffix with the meanings “composed of,” “resembling, having the nature of,” occurring in loanwords from Latin (igneous; ligneous; vitreous); also, as a semantically neutral suffix, found on adjectives of diverse origin, sometimes with corresponding nouns ending in -ty2 (beauteous; courteous; hideous; homogeneous; plenteous; righteous).
Origin of -eous
< Latin
-eus; see
-ous
British Dictionary definitions for -eous
Word Origin for -eous
from Latin
-eus