Where does “Böter” come from?

Böter (North Frisian) comes from Old Frisian butere, from Proto-West Germanic buterā, from Latin būtȳrum, from Ancient Greek βούτυρον, from Ancient Greek τυρός, from Proto-Hellenic tūrós, from Proto-Indo-European tuh₂-ró-s, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

Böter (North Frisian): butter

Definitions

butter

Ancestry of “Böter”, step by step

Step	Language	Word	Meaning
1	Old Frisian	butere	—
2	Proto-West Germanic	buterā	butter
3	Latin	būtȳrum	butter
4	Ancient Greek	βούτυρον	butter
5	Ancient Greek	τυρός	cheese
6	Proto-Hellenic	tūrós	cheese
7	Proto-Indo-European	tuh₂-ró-s	—
8	Proto-Indo-European	tewh₂-	to swell; to crowd; to be strong

Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tuh₂-ró-s →Every word from Proto-Hellenic tūrós →