different between unsuitable vs inexpedient

English

un- +? suitable

unsuitable (comparative more unsuitable, superlative most unsuitable)

in- +? expedient

inexpedient (comparative more inexpedient, superlative most inexpedient)

Not expedient; not tending to promote a purpose; not tending to the end desired; unsuitable to time and place
- 1856, Albert Mackey, The Principles of Masonic Law Chapter XXII
  But the reputation of the Order must not be permitted to be endangered, and a case might occur, in which it would be inexpedient to extend this courtesy, and where the lodge would feel compelled to proceed to the trial and punishment of the offender, without appealing to his lodge.

inexpedient in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
inexpedient in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.

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