Play word 妻白 妻白 つまじろ silvertip shark (Carcharhinus albimarginatus, a requiem shark found throughout the tropical Indian and Pacific Oceans)
Play word 糸爪 糸爪 いとづめ groove in a shamisen player's fingernail caused by the friction of the string of the instrument
Play word 夜爪 夜爪 よづめ cutting one's nails at night (said to cause one to miss the deathbed of one's parents)