Hyphenation
 sub·ter·ra·ne·anTurkish pronunciation
 sıbtıreyniınSynonyms
 underground, 
below ground, 
buried, 
covered, 
covert, 
hush-hush, 
on the qt, 
private, 
secret, 
subterrestrial, 
subversive, 
sunken, 
underfoot, 
under wrapsPronunciation
 /səbtərˈānēən/ /səbtɜrˈeɪniːən/
Etymology
 [ "s&b-t&-'rA-nE-&n, ] (adjective.) 1603. Latin subterraneus, from sub- + terra earth; more at THIRST.