Related to the Latvian verb krākt (“to roar”). The most likely theory is that the word krāce was influenced by krākt (in, e.g., lengthening the ā), but that it originally was *krace, a form of dialectal kracis (“pole with crossbar (for drying grain)”), from Proto-Indo-European *krek-, *krok- (“to stand out, to stick out, to straighten oneself”), which would originally suggest the specific configuration of rapids in the Daugava river.
krāce f (5th declension)
- rapids (section of a river where the water flows rapidly down, usually over or around rocks)
mutuļainas krāces ― rapids with eddies, whirlpools
šalc krāces ― the rapids rustle
krāču ūdens ― rapids water
laiva tuvojās krācēm ― the boat is approaching the rapids
upe gāžas lejup no kalniem, veidojot krāces un ūdenskritumus ― the river runs down from the mountains, forming rapids and waterfalls