Is 'tsunami' English, or is it actually Japanese?

'Tsunami' is a word borrowed from Japanese 'tsunami'. The word entered the English language some time around 1897.

tsunami [noun] [1897]

A great sea wave produced especially by submarine earth movement or volcanic eruption - tidal wave

See 'tsunami' on the Loan Words Map

See more loan words from Japanese.

Etymology: Japanese, from 'tsu' harbor + 'nami' wave

See more loan words from 1800s.