Ísjaki

You knew me I knew you We knew this all would end You missed me (note: in the way you miss a bus) I missed you We lost our footing Now we lie along the river all ice-cold and blue trembling to our bones half-dead from the cold Isjaki (iceberg)

Chorus:

You never say anything You're an iceberg you're frosted over you're as quiet as the grave and you hide yourself behind an iceberg x2

I kindled a fire within me I kindled a fire within you now we light a fire, sulfur, flame it sparks within me it sparks within you our sparks burn us up to ash

Ísjaki iceberg

You never say anything You're an iceberg you're frosted over you're as quiet as the grave and you hide yourself behind an iceberg x2

(plucked together from youtube comments translating the lyric video on the Sigur Rós channel)