Biodegradable: Readily broken down.
Confine: To keep or hold within limits.
Ecstacy: Very great happiness.
Grave: Important, worthy of being deeply considered.
Inflammation: Hot,red,sore swelling pat of the body.
Monotonous: Having little or no change.
Primitive: Of or belonging to old times.
Reel: to walk or move unsteadily.
Remnant: what's left over
Trial: The act of trying or testing.