principal clause

16 LETTERS · STARTS WITH P

principal clause is a valid 16-letter word worth 23 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3R1I1N1C3I1P3A1L1C3L1A1U1S1E1
3 + 1 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =23 PTS
DOUBLE WORD → 46TRIPLE WORD → 69
MEANING

What does principal clause mean?

1