jiwari-to
Something gradually spreading or seeping in — water through soil, warmth through the body, or emotions building.
💡Rain water slowly seeping through the tent — 'Water was jiwari-to coming through the fabric.'
地面にじわりと水がしみ込んでいく。
Water is jiwari-to seeping into the ground.
The stain ___ spread across the white tablecloth.
シミが白いテーブルクロスに○○と広がった。