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Handwriting
Example
When I enter the room, the light turns on automatically.
Usage Notes
点く (つく) is an intransitive verb used when something ignites or an electric device turns on by itself or by some action. It's often used for lights (電気が点く), fire (火が点く), or appliances like TVs (テレビが点く). The transitive counterpart, meaning 'to turn something on', is 点ける (つける).
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