Plain.
The opposite of ornate is plain.
Bare
pupil
Polluted.
polluted
A "teacher" is one who imparts information or knowledge to othersThe word cannot have a direct antonym (someone who takes away your knowledge). However, the complement to "teacher" is "student." The word meaning student that begins with a P is pupil.
Ugly ;P Ugly ;P Ugly ;P
p
dolla................:P
i the p
The antonym of flat is round.
The antonym of leader is follower.