not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

easy / simple, uncomplicated / brief, light, short

ease / simplicity / lightness, brevity

a Western knife, table knife

sharp (physically like an edge, or visually as in an image)

(music) a sharp (sign for a sharp note on the staff) / Clipping of シャープペンシル (shāpu penshiru, “mechanical pencil”).

(Okinawa, dialect) shop

(chiefly in mathematics, physics) for simplicity; for the sake of simplicity