dam (redirected from decametre)

dam something up

to erect a barrier in a river, stream, brook, etc. We are going to have to dam this stream up to make a pond for the cattle. Let's dam up this stream. Why is this river dammed up?

See also: up

water over the dam and water under the bridge

Fig. past and unchangeable events. Your quarrel with Lena is water over the dam; now you ought to concentrate on getting along with her. George and I were friends once, but that's all water under the bridge now.

See also: water

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be water under the bridge  (British, American & Australian) also be water over the dam (American)

if a problem or an unpleasant situation is water under the bridge, it happened a long time ago and no one is upset about it now We certainly had our disagreements in the past, but that's all water under the bridge now.

See of the first water, could talk under water, blow out of the water, hold water, test the water, tread water

See also: bridge, water