可

can / may / able to / to approve / to permit / to suit / (particle used for emphasis) certainly / very

used in 可汗[ke4 han2]

male adult / the 4th of the 10 Heavenly Stems 天干[tian1 gan1] / fourth (used like "4" or "D") / small cube of meat or vegetable / (literary) to encounter / (archaic) ancient Chinese compass point: 195° / (chemistry) butyl

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

cannot; should not; must not

cannot / should not / must not

to consider oneself unexcelled in the world / to be insufferably arrogant

inestimable / incalculable / beyond measure

inviolable / inviolability

inviolability

Viagra

may not

once it gets started there's no stopping it

to be impossible to stop once started

to succeed at the first try (idiom) / easy as pie / one can do it at once