to keep one's nose to the grindstone こつこつ働く [こつこつはたらく] /(exp,v5k) to work hard/to toil/to moil/to keep one's nose to the grindstone/to slug away/ ------- コツコツ働く [コツコツはたらく] /(exp,v5k) to work hard/to toil/to moil/to keep one's nose to the grindstone/to slug away/ |