oyster
Refers to the shellfish; also used for the shell itself in contexts like oyster shell powder.
Oysters are especially delicious in winter.
I got food poisoning from raw oysters and had stomach trouble.
カキの殻をリサイクルする。
Recycle oyster shells.
The fisherman skillfully shucked the oysters.
Oysters are farmed in this bay.
牡蠣 (the oyster) and 柿 (the persimmon fruit) are pronounced identically as かき but written with completely different kanji and refer to unrelated things.
counter for small objects; counter for pieces · counter for military units · individual; one person · counter for years of age difference; counter for school years
Most common spelling in everyday use; katakana is typical for this word.
Standard kanji form, but the word is usually written in kana.
Hiragana spelling, also common.
Variant kanji form; less common than 牡蠣.
Abbreviated kanji form; rarely used.
Obscure variant; not in common use.
The origin is uncertain, but the word is native Japanese. The kanji 牡蠣 are Chinese characters used for their meaning, not phonetic value.