欠かけ

noun

fragment; splinter; chip

Refers to a small piece broken off from a larger object, such as a chip of wood, glass, or pottery.

• ガラスの欠かけが床ゆかに落おちていた。

  A fragment of glass had fallen on the floor.

• 木きの欠かけで指ゆびを切きってしまった。

  I cut my finger on a splinter of wood.

noun

wane (of the Moon)

Used in the phrase 月の欠け (the waning moon) or in astronomical contexts. Not a common standalone word for the moon's phase in everyday conversation.

• 月つきの欠かけを観かん察さつする。

  Observe the waning of the moon.