TRICKY or TRICKISH?

English for Today by Ganiu Abisoye Bamgbose (Dr GAB)

TRICKY or TRICKISH?

Writing a good proposal can be very ~trickish~ (nonstandard).
Writing a good proposal can be very *tricky* (standard).
If you describe a task or problem as tricky, you mean that it is difficult to do or deal with.

He will always get what he wants; he’s a *tricky* being (acceptable).
He will always get what he wants; he’s a *trickish* being (acceptable).
Being trickish is having or showing skill in achieving one’s aims by indirect or deceitful methods. Note that “tricky” can be used in the two senses above, but “trickish” is unacceptable in sentence one.
GAB