impetus   (Sound)

The impetus has 2 Senses.

• impulsion, drift, impetus
• 起動力, 推進力, 推力
• a force that moves something along
• 何かを何かに沿って動かす力

• impulsion, impulse, impetus
• 運動力, 調子, 衝撃, 衝動, インパルス, 余勢
• the act of applying force suddenly; "the impulse knocked him over"
• 突然力を加える行為