Karate means 'Empty Hand'
'Kara', as in 'karaoke', literally 'empty orchestra'.
The Japanese word for "undertow" would typically be "hikinami" (引き波) or quite literally "pulling wave".
星雲 (seiun) means 'nebula' in Japanese. Literally, the word means 'cloud of stars'.
The Japanese word for "monthly" is 毎月 (maigetsu), which literally means "every month".
oushi which literally means big cattle
Tomato. Literally. How it sounds.  トマト
Literally: "Demon" or "Evil Spirit"
Karate literally means empty hand in Japanese.
The Japanese word 'sayonara' means 'goodbye or farewell' in Japanese. This phrase originated from 1875 in Japan. It is literally translated as "if it is to be that way" from sayo and "that way" plus nara "if".
騎士道 /ki shi dou/ is an exact equivalent for 'chivalry' in Japanese, literally meaning 'the way of knight'.
Japanese word for 'rear-view mirror' (literally 'back mirror').
The regular ordinary Japanese person's word for snowflake is "seppen." But Japanese poets and writers use the term "yuki no hana" which literally means "snowflower" -- a prettier, more poetic word for the beautiful snowflake.