Meaning
"a bridle," is used in Jam 3:3 (AV, "bits"), and Rev 14:20. "The primitive bridle was simply a loop on the halter-cord passed round the lower jaw of the horse. Hence in Psa 32:9 the meaning is bridle and halter" (Hastings, Bib. Dic.).
from chalinos and ago, "to lead," signifies "to lead by a bridle, to bridle, to hold in check, restrain;" it is used metaphorically of the tongue and of the body in Jam 1:26, Jam 3:2.