Maybe the following comparison between “fit” and “suitable” will give you an idea for the nuances between “to fit” and “to suit” Fit refers to what is adapted for or suited to a purpose, occasion, or use : a meal fit for a gourmet; a tractor fit for heavy duty; not a fit time or place for an argument. Suitable implies ability to meet a requirement, fill a need, or answer a purpose : an overcoat suitable for everyday wear; a book not suitable for children. Excerpted from The American Heritage® Dictionary of the English Language, Third Edition © 1996 by Houghton Mifflin Company.
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