Use 'mordant' to describe someone's truth that's painfully pointed, not just any criticism. Her mordant observation about his work ethic made him reconsider his efforts.
Pro Tip 2/3
Negatively Witty
'Mordant' often implies wit used in a negative context, not for light-hearted jokes. The comedian's mordant remarks about politicians caused some unease in the crowd.
Pro Tip 3/3
Avoid Casual Use
'Mordant' is best not used in casual conversations due to its harsh tone. His mordant comments were inappropriate at the casual dinner party.