Translation of "Sejt" in English

Semmit sem sejt.

He is completely clueless.

Sok kóros sejt található ott –

there's a lot of abnormal cells there -

Amely az 50 billió sejt mindegyikében megvan,

which is contained in every one of 50 trillion cells

- Gyanít Tom bármit is?
- Sejt valamit Tom?

Does Tom suspect anything?