noun🔗Share井戸の井口、水源The place where a spring breaks out of the ground; the source of water for a stream or well."The hikers followed the stream uphill until they reached the wellhead, a small pool of clear water bubbling from the earth. "ハイカーたちは、井戸の井口、つまり大地から湧き出る澄んだ水の小さな水たまりにたどり着くまで、小川を上っていきました。geologynatureenvironmentChat with AIVocabulary GamePractice Reading
noun🔗Share源泉, 泉源The source of something; a fountainhead."The library served as the wellhead of knowledge for the entire community. "図書館は地域社会全体の知識の源泉として機能しました。geologynatureenvironmentChat with AIVocabulary GamePractice Reading
noun🔗Share油井の井戸口The surface structure of an oil well etc."The workers tightened the valve on the wellhead to prevent any leaks. "作業員は漏れを防ぐために、油井の井戸口のバルブを締めました。technicalindustrygeologyenergystructureChat with AIVocabulary GamePractice Reading
