(1):

(n.) A caltrop.

(2):

(n.) The genus Ranunculus, of many species; some are common weeds, others are flowering plants of considerable beauty.

(3):

(n.) A number of small cords rove through a long block, or euphroe, to suspend an awning by.

(4):

(n.) A tool with a side claw for recovering broken rods, etc.