singe
Shade or tint.
"Flammable" means to ignite or burn easily.
Burning would probably do nicely Burn
No hydrogen will not burn in the absence of air unless another oxidizer is present.
Sulfur is another word for sulphur.
singe or scorch
sear
Burn
heart burn
sizzle..?
Emended, amended...
good condition
partially damaged
reduce to ashes
melt, burn, sear, scorch
Shade or tint.
pain, burn, sour