ETYM Pref. dis- + loyal: cf. Old Fren. desloial, desleal, French déloyal. Related to Loyal.
Deserting one's allegiance or duty to leader or cause or principle.
1. Not true to duty or obligation or promises
2. Not trustworthy
Without loyalty; in a disloyal manner.
In an unfaithful undependable unreliable manner; SYN. undependably, unreliably.