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subterranean

sub·ter·ra·ne·an

subterranean

pronunciation:
suhb t reI ni n
parts of speech:
adjective, noun
features:
Word Parts
part of speech: adjective
definition 1: below the earth's surface; underground.
similar words:
cavernous
definition 2: secret or hidden, as if underground.
 
part of speech: noun
definition: one that is or operates underground.
derivations: subterraneous (adj.), subterraneanly (adv.), subterraneously (adv.)
Word Parts
The word subterranean contains the following parts:
sub- Latin prefix that means under, after
Show wordsHide wordsMore about this word part:
The prefix sub- was a Latin preposition and prefix and occurs in English in Latin loanwords, such as subjugate . It is also used in the formation of English words such as subway and subgroup . It has multiple forms, as the 'b' sound in sub- assimilates to the initial sound of the base to which it is attached. See the assimilated forms suc-, suf-, sug-, sum-, sup-, sur-, sus-, and su-.
synonyms:
hyp-, hypo-, under-
antonyms:
super-, supra-, hyper-
 
terr, terra Latin root that means earth, land
synonyms:
geo