Where does “тихоокеанский” come from?

тихоокеанский (Russian) comes from Russian ти́хий, from Old East Slavic тихъ, from Proto-Slavic tixъ, from Proto-Balto-Slavic teišus.

тихоокеанский (Russian): Pacific

Definitions

тихоокеанский traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Russian	ти́хий	quiet
2	Old East Slavic	тихъ	—
3	Proto-Slavic	tixъ	still, quiet
4	Proto-Balto-Slavic	teišus	—

Step	Language	Word	Meaning
1	Russian	океа́н	ocean
2	Ancient Greek	ὠκεανός	ocean
3	Ancient Greek	Ὠκεανός	the great earth-encircling river; Oceanus, a...