underground
名词复数：undergrounds
词形变化：
动词过去式: undergrounded | 动词过去分词: undergrounded | 动词现在分词: undergrounding | 动词第三人称单数: undergrounds |
同义词：
covert | concealed | belowground | secret | undercover | surreptitious | clandestine | hush-hush | subway | resistance | tube | metro | subterranean | subterrestrial | hypogeous | sunken | subversive | nether | buried | secretive | below the surface | dissident | underfoot | alternative | hidden | underhand | underhanded | backdoor | under-the-table | under-the-counter | under wraps | private | opposition | subversiveness | incendiaries | terrorists | underground railway | subterraneously | subterraneanly | by tube | secretly | in secret | privately | in private | out of view | covertly | clandestinely | surreptitiously | furtively | stealthily | on the sly | sneakily | sneakingly | underhandedly | illegally | unlawfully | underworld | cloak-and-dagger | hell | nether regions | tunnel | underpass | gallery | hole-and-corner | corridor | subterrane | mine | hugger-mugger | cave | burrow | subway system | hole | pit | grave | tomb | sepulchre | crypt | vault |
反义词：
词义辨析：
同义:
a.地下的, 隐藏的, 埋藏的
subterranean
subterrestrial
hypogeous
belowground
sunken
nether
buried
below the surface
underfoot
a.秘密的, 隐蔽的, 偷偷的
secret
undercover
hidden
covert
clandestine
surreptitious
underhand
underhanded
backdoor
under-the-table
under-the-counter
under wraps
concealed
private
hush-hush
n.地狱, 冥府
underworld
hell
nether regions
n.地道, 矿井, 洞穴, 坟墓
tunnel
underpass
subterranean passage
gallery
corridor
subterrane
mine
cave
burrow
hole
pit
grave
tomb
sepulchre
crypt
vault
n.反对派, 起义者, 革命者
resistance
opposition
subversiveness
insurrectionaries
insurgents
seditionaries
incendiaries
saboteurs
terrorists
n.地下铁道
subway
underground railway
metro
tube
反义:
a.地下的, 地面下的
overground