The word Dul is misspelled against Dull, a verb meaning "To become dull or stupid."
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Dull has double 'll' in the end mispronounced as 'l'
Remember double 'LL' appears in the end of this word which should not be misspelled with single 'L'
Wrong Spelling: du-l
Correct Spelling: du-ll
Check more misspelled words of Dull to spell it correct.