Third-person singular present tense of 'foment': he, she, or it instigates or stirs up trouble.
From Latin 'fomentare' with the third-person singular present suffix '-s'.
This is the form you'll hear in news articles constantly: 'The propaganda foments division among voters'—a verb so useful for describing modern politics that it never seems to go out of style.
Complete word intelligence in one call. Free tier — 50 lookups/day.