In some narrow straits, tides can cause currents hazardous to small boats. One name for this is "euripus", derived fronm one well know in antiquity, between Boeotia and Euboea.

euripus
n.,
pl. 3pi# 73pj#8 5L < Gr euripos < eu3 (see EU3) + rhipc, rush, impetus, orig., turning motion < IE *wrei3 < base *wer3, to turn > L vertere, Ger reiben, to grate6 a strait or channel with a violent current or tide