This is the 19th most frequent Icelandic word.
sér
The Icelandic word "sér" means "sees" (third person singular of "sjá") or "for oneself."
The word 'sér' is the third person singular present form of the verb 'sjá', meaning 'to see'.
Hún sér fuglinn í trénu.
She sees the bird in the tree.
The word 'sér' is used reflexively here to indicate the action is directed towards the subject himself.
Hann tekur sér tíma til að slaka á.
He takes time for himself to relax.
The word 'sést' is derived here showing a reflexive meaning, and 'þér' refers to the dative personal pronoun meaning 'to you'.