the person or thing that motivates or leads progress
進歩を促進する、または導く人や物 (shinpo o sokushin suru, matawa michibiku hito ya mono)
"She was the driving force behind the project."
"彼女はプロジェクトの背後にある推進力でした。" (kanojo wa purojekuto no haigo ni aru **suishinryoku** deshita.)
To do something dangerous or risky.
to cause complete failure in a system or process
to make a decision based on your feelings
to make someone very sad
someone who posts aggressive or angry comments online
to become aware of or responsive to something or someone
