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: <
Latin -eus; see
-ous