Initial
The opposite for the word plain starting with letter f is FANCY.
amateur
Modern.
stop
irrelavent
stopping
stopping
Given
Narrow is the opposite of wide. It begins with the letter N.
Mighty is the opposite of weak. It begins with the letter m.
Wisdom is the opposite of folly. It begins with the letter w.
Gloomy and glum are the opposite of cheerful. They begin with the letter G.