不可导

not differentiable (function in calculus)

no; not so / (bound form) not; un-

cannot / should not / must not

cannot; should not; must not

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

used in 可汗[ke4 han2]

differentiable (calculus)

to transmit / to lead / to guide / to conduct / to direct