dam: [12] Dam, appropriately enough for a word related to the human control of water-courses, seems to have been borrowed from Middle Dutch dam. It appears to have been a fairly widespread West and East Germanic word, subsequently borrowed into North Germanic, but its ultimate source is not known.
dam (n.1)
"water barrier," early 14c., probably from Old Norse dammr or Middle Dutch dam, both from Proto-Germanic *dammaz (cognates: Old Frisian damm, German Damm), which is of unknown origin.
dam (n.2)
"animal mother," c. 1300, variant of dame (q.v.), also originally used, like that word, for "lady, mother;" but meanings diverged into separate spellings by 16c.
dam (v.)
late 15c., from dam (n.1). Related: Dammed; damming.
例文
1. Breaking the dam could submerge downstream cities such as Wuhan.
ダムを破壊すると、武漢などの下流都市が水没する可能性があります。
2.The dam will stand 600 feet high.
ダムは600フィートに達する。
3.A dam burst and flooded their villages.
堤防が決壊し、彼らの村を水没させた。
4.Building a dam here could have unforeseable consequences for the environment.
ここにダムを建設すると、環境に予想できない結果をもたらす可能性があります。
5.They built dykes and dam to hold back the rising flood waters.