keel

noun
1
the long piece of wood or steel along the bottom of a ship, on which the frame is built, and which sometimes sticks out below the bottom to help it to keep steady in the water and prevent it from falling on its side
کیل, شاه‌تیر
verb
1
to fall over to one side; to make something fall over to one side
واژگون شدن, کج شدن, یک طرف افتادن
synonym capsize