The word Stiadly is misspelled against Staidly, an adverb meaning "In a staid manner, sedately."
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Word contains consecutive vowels 'AI' in between alphabets st & dly is misspelled as 'IA'
Wrong Spelling:  st-ia-dly 
Correct Spelling:  st-ai-dly 
Find more wrongly spelled words of Staidly to spell it well.