This is the 3917th most frequent Japanese word.
ケ
"ケ" is a katakana character used phonetically in Japanese to represent the sound "ke" and has no intrinsic meaning unless part of a word or name.
In this sentence, 'ケーキ' (cake) uses 'ケ' as part of the phonetic katakana script to represent the English-origin word 'cake'.
彼は毎日ランチにケーキを食べます。
He eats cake for lunch every day.
Here, 'ケ' is part of the name 'ケンタ' (Kenta), demonstrating usage in names rendered in katakana.
ケンタはとても元気な学生です。
Kenta is a very lively student.
In this instance, 'ケ' is part of 'ケセラセラ' (Que Sera, Sera), showcasing its use in foreign-origin phrases written in katakana.