n change toward something smaller or lower
n a condition inferior to an earlier condition; a gradual falling off from a better state
n a gradual decrease; as of stored charge or current
n a downward slope or bend
v grow worse
v refuse to accept
v show unwillingness towards
v grow smaller
v go down
v go down in value
v inflect for number, gender, case, etc., "in many languages, speakers decline nouns, pronouns, and adjectives"