Synonym Boundary: "なる", "病気になる", "空く", "げっそり", "痩せこける"

When expressing "become" in Japanese, you must carefully distinguish between "なる", "病気になる", "空く", "げっそり", "痩せこける" based on context.

• なる (なる (naru) - Level: N4): Maps to "to become" and is used when An intransitive verb meaning to become or to grow into. Used with nouns.
• 病気になる (びょうきになる (byōki ni naru) - Level: N4): Maps to "to become sick; to get ill" and is used when 「病気」は名詞で、「〜になる」は状態の変化を表す動詞です。健康な状態から病気の状態へ変わることを指します。.
• 空く (あく (aku) - Level: N3): Maps to "to become empty, to become available, to be vacant (intransitive)" and is used when Intransitive verb. Used for spaces becoming empty.
• げっそり (げっそり (gessori) - Level: N2): Maps to "become thin, lose a lot of weight (from worry/illness); feel disappointed/discouraged" and is used when Describes a sudden and significant loss of weight due to illness, worry, or shock, resulting in an emaciated appearance. Can also describe a feeling of deep disappointment..
• 痩せこける (やせこける (yasekokeru) - Level: N2): Maps to "to become very thin, to become emaciated, to be gaunt" and is used when To become extremely thin, often to an unhealthy degree, due to illness, hardship, lack of food, or stress. It implies a noticeable and often skeletal appearance. 病気や苦労、食事不足などにより、極度に痩せて骨ばった状態になることを指す。健康的な痩せ方ではない、というニュアンスがある。.

Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!