The word Mariable is misspelled against Marriable, an adjective meaning "Marriageable."
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Marriable has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings ma & iable which should not be misspelled with single 'R'
Wrong Spelling:  ma-r-iable 
Correct Spelling:  ma-rr-iable 
Find more wrongly spelled words of Marriable to spell it well.