Proto-Baltic: *grim- (1) vb. intr. (Lett AC, 1/CIRC? ~ Lith CIRC)
Meaning: sink
Lithuanian: gramzdìnti 'versenken', grimstù (prt. grimzdaũ) 'sinke' (ME I:655)
Lettish: grim̂t2, grim̃t (-stu, -mu) intr. `sinken, untergehen, zu Grunde gehen'; grèmdêt (-ẽju) fact. 'senken, versenken'