tříska znamená v angličtina

sliver [slivers]▼(a long piece cut or rent off; a sharp, slender fragment)
noun
[UK: ˈslɪ.və(r)] [US: sˈlɪ.vər]

splinter [splinters]▼(fragment of material)
noun
[UK: ˈsplɪn.tə(r)] [US: ˈsplɪn.tər]