[floun.der] n, pl flounder or flounders [ME, fr. AF floundre, of Scand origin; akin to ON flythra flounder] (15c): flatfish; esp: a fish of either of two families (Pleuronectidae and Bothidae) that include important marine food fishes
[2]flounder vi floun.dered ; floun.der.ing [prob. alter. of founder] (1592) 1: to struggle to move or obtain footing: thrash about wildly
2: to proceed or act clumsily or ineffectually