Takeoff — when an airplane (or similar aircraft) leaves the ground and ascends into the air; commonly used in aviation contexts.
飛行機は予定どおり離陸した。
The airplane took off as scheduled.
悪天候のため離陸が遅れた。
Takeoff was delayed due to bad weather.
離陸時に耳が痛くなる人もいる。
Some people experience ear pain during takeoff.