How to say "automatic" in Japanese
Choosing the right word
- 自動じどうno-adjectiveThe default word for the mechanical sense: machines and devices that operate on their own — doors, cameras, a car's transmission — without a person operating them.
- prenominal modifierThe clipped loanword 'auto'; it appears chiefly inside borrowed compounds or as a short 'auto' label on devices and settings, rather than as a standalone word.
- no-adjective, na-adjectiveThe full katakana loanword; in a car it names the automatic transmission, while for other machinery 自動 is generally the safer pick.
- 自動的じどうてきna-adjectiveCovers the figurative sense: an action performed automatically, without conscious thought or intention, as if by habit or reflex. For machines and devices, 自動 is the word instead.
- 自然しぜんna-adjective, nounReally means 'natural' or 'spontaneous'; its 'automatic' sense applies only to something happening of its own accord, without effort or deliberate intent, so it is seldom the word you want for 'automatic'.
Choose 自動 for machines that work by themselves, 自動的 for actions done without conscious thought, 「オート」 or 「オートマチック」 for loanword 'auto' (the latter chiefly in cars), and 自然 only when something happens naturally of its own accord.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
See also
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