積 means “pile up, load”

つむ · tsumu

Also: volume, product (x*y), acreage, contents

Kun'yomi (Japanese reading)
つむ, つもる, つもり
On'yomi (Chinese reading)
セキ

JLPT N3 · Taught in grade 4 · 16 strokes

The story

Picture grain (禾) stacked high to cover what is owed (責): sheaves piled up after the harvest. 積む is to stack or load, snow 積もる, piles up, deep in Niigata, and a 見積もり is a quote that adds it all up.

Used in 積む (tsumu, to stack/load), 積もる (tsumoru, to pile up), and 面積 (menseki, area)

More from How Much, How Many

Learn 積 and more kanji free on Fuji Learning · All kanji

Readings from KANJIDIC2, © EDRDG, CC BY-SA.