ichidan verb, transitive verb
Forcefully thrusting a pointed object into something, often with a single motion.
彼はナイフを地面に突っ立てた。
He stabbed the knife into the ground.
ichidan verb, transitive verb
plant upright; stick upright
Placing something long and thin into the ground or a surface so that it stands vertically, like a pole or stick.
庭に棒を突っ立てて、目印にした。
I stuck a pole upright in the garden as a marker.