ig·ne·ous
adjective/ˈɪɡniəs/
/ˈɪɡniəs/
(geology)- (of rocks) formed when magma (= melted or liquid material lying below the earth’s surface) becomes solid, especially after it has poured out of a volcano
火成的（尤指火山喷出的） Oxford Collocations DictionaryIgneous is used with these nouns:- rock
Word Originmid 17th cent.: from Latin igneus (from ignis ‘fire’) + -ous.