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Physical Science
HIGH_SCHOOL
Proto-
First
Pseudo-
False
Psych-
Soul, mind
Pterido-
Fern
Pub-
Adult
Pyro-
Fire, heat
Re-
Back again
Retro-
Backward, behind
Rhiz-
Root
Sacchar-
Sugar
Sapro-
Decay, rotten
Scler-
hard
Semi-
Half, partial, incomplete
Septic-
To make putrid