Thorough(adj) passing through or to the end; hence, complete; perfect; as, a thorough reformation; thorough work; a thorough translator; a thorough poet. Thorough(adverb) thoroughly. Thorough(adverb)
See example
The thorough poet made sure not to make a single mistake in his writing.
<span>The answer is true - Both Wilfred Owen and Siegfried Sassoon wrote about their firsthand knowledge of the horrors a soldier encountered on the battlefield.</span>