The word Tunelled is misspelled against Tunnelled, which is past tense of "Tunnel"
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Tunnelled has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings tu & elled which should not be misspelled with single 'N'
Wrong Spelling: tu-n-elled
Correct Spelling: tu-nn-elled
Check more misspelled words of Tunnelled to spell it correct.