1580s, "opposed to moral order, disposed to violate the restraints of public morality;" also "opposed to legal authority, disposed to violate law;" see disorder (n.) + -ly (1). The meaning "untidy, being out of proper order" is attested from 1630s; the older senses are those in disorderly house, disorderly conduct, etc.
disorderly youths
disorderly conduct
a disorderly pile of clothes
disobedience
disobedient
disobey
disoblige
disorder
disorderly
disorganization
disorganize
disorient
disorientation
disown