belly crawl; commando crawl
Refers to a baby's crawling style where the belly stays on the floor, dragging the body forward with the arms. Common in parenting and child development contexts.
Our baby can still only do the belly crawl.
ずりばいの時期はあっという間に過ぎる。
The belly-crawling stage passes in the blink of an eye.
Kanji form is rare; the word is usually written in kana.
From ずり (ずる, 'to slide or drag') + 這い (はう, 'to crawl'). The exact derivation is uncertain, but it describes the dragging motion of a baby's belly crawl.