thundercloud

See also: thunder cloud

English

From thunder +‎ cloud.

thundercloud (plural thunderclouds)

(meteorology) A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning.
Synonym: storm cloud
(by extension, figurative) Something menacing and brooding.
the ominous thunderclouds of war

cloud

Arabic: سَحَاب رَاعِد m (saḥāb rāʕid) (collective or in general), سَحَابَة رَاعِدَة f (saḥāba rāʕida), رَاعِدَة f (rāʕida) (one)
Bulgarian: буреносен облак m (burenosen oblak), гръмотевичен облак m (grǎmotevičen oblak)
Chinese:
Mandarin: 雷雲 / 雷云 (zh) (léiyún)
Danish: tordensky (da) c
Erzya: ковол (kovol)
Finnish: ukkospilvi (fi)
German: Gewitterwolke (de) f
Hungarian: viharfelhő (hu)
Ingrian: ukontuuca, jyrypilvi
Korean: 뇌운 (ko) (noe'un)
Kumyk: къара булутлар (qara bulutlar)
Norwegian:
Bokmål: tordensky m or f
Polish: chmura burzowa f
Russian: грозова́я f (grozovája)
Southern Altai: кӱкӱрттӱ булут (kükürttü bulut)
Spanish: nubarrón (es) m
Swedish: åskmoln (sv) n
Turkish: fırtına bulutu

something menacing and brooding