speedup
شتاب امیز
snap, slapdash, posthaste, precipitate, thoughtless, hasty, sudden, unadvised
شتاب زده
hasty, precipitous, summary, precipitate, cursory, hurried, impetuous, rash
شتاب منفی
negative or minus acceleration
شتاب نما
hodograph
شتاب کار
rash, quick in action
شتاب کردن
hurry, post, hotfoot