Answer:

reck

Answer	Crossword Clue
RECK	Heed
RECK	Be aware: Archaic.
RECK	Take heed.

RECK	Take heed (of): Archaic.
RECK	Take heed of: Archaic.
RECK	Head: Archaic.
RECK	Take heed (of), old style.
RECK	Take heed
RECK	Consider
RECK	Consider, old style
RECK	"And ye may better ... the rede": Burns

RECK	Be of importance, old-style
RECK	Matter to