unfaithful
adjective
not faithful; false to duty, obligation, or promises; disloyal.
unfaithfulness
-
a word derived from
unfaithful.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Financial infidelity is at least as damaging to a marriage and a couple’s livelihood as other kinds of secrecy and unfaithfulness.
From MarketWatch ● Mar. 2, 2026
This "unfaithfulness" has been understudied despite its importance for ensuring safety and efficiency in healthcare reporting.
From Science Daily ● Feb. 22, 2024
Following her arrest, police recovered voice messages in which she expressed her "anger and sense of betrayal" over his "unfaithfulness, or assumed unfaithfulness," the court heard.
From BBC ● Oct. 10, 2022
Pedro connects with an estranged cousin, and Nicole spills the details of Alejandro’s unfaithfulness to Coraima.
From Washington Post ● Oct. 31, 2021
Derelic′tion, act of forsaking, unfaithfulness or remissness: state of being abandoned: land gained from the water by a change of water-line.
From Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Various
