allotrope (noun) diamond: gemstone
Sinonime: advance,
approach, be dangerous, be gathering, be imminent, be in the air, be in the offing, be on the horizon, brewing, come on, forebode,
foreshadow,
frighten, hang over, impend, imperil,
jeopardize,
loom, overhang,
portend,
presage, put at risk, put in jeopardy,
warnAntonime: guard,
protect,
save