thorough: [OE] Thorough is ultimately the same word as through. Both go back to Old English thurh ‘through’. In its single-syllable form it has stuck to its original role as a preposition and adverb, but in the case of thorough this has now virtually died out, leaving only the adjective, which evolved in the 13th century from the notion of going ‘through’ something so as to affect every part. => thrill, through
thorough (adj.)
c. 1300, adjectival use of Old English turuh (adv.) "from end to end, from side to side," stressed variant of turh (adv., prep.); see through. Related: thoroughly; thoroughness.
例文
1. The degree provides a thorough grounding in both mathematics and statistics.
この学位課程は数学と統計学のためにしっかりとした基礎を築く。
2.A thorough brushing helps to freshen up your mouth.
徹底的に歯を磨くことは、口臭をスッキリさせるのに役立ちます。
3.He uncoiled the hose and gave them a thorough drenching.
ホースを広げ、完全に洗い流した。
4.Despite a thorough investigation，no trace of Dr Southwell has been found.
徹底的に調査したにもかかわらず、ソスフェル博士の痕跡は発見されなかった。
5.The prospects are that he will give opponents a thorough pounding.