verb/kɔ̃.paʁ.ti.mɑ̃.te/
to put into compartments, compartmentalize, to section off
“Tout ceci varie selon les pays: d'après les conditions physiques, la plaine favorise les échanges sur de grandes distances, le dialecte tend à plus d'uniformité; la montagne compartimente plus ou moins, on vit davantage en petites communautés, la tendance est alors à la fragmentation dialectale.” — All of this varies by country: following the physical conditions, the plain facilitates exchanges over long distances, the dialect tends towards more uniformity; the mountain sectionalizes more or less, the people live more in small communities, the tendency is therefore towards dialectal fragmentation.
Related: compartimentation
From compartiment + -er.