機械がスムーズに動く

kikai ga sumūzu ni ugoku

What does "機械がスムーズに動く" mean?

run smoothly

この工場の機械は常にスムーズに動く。

The machines in this factory always run smoothly.

How to use "機械がスムーズに動く" correctly?

Engineering

technical

For machinery to operate without friction, hesitation, or malfunction, achieving efficient and continuous motion.

エンジンがスムーズに動くように、定期的なメンテナンスが必要だ。

Regular maintenance is needed for the engine to run smoothly.

このロボットアームはスムーズに動く設計になっている。

This robotic arm is designed to move smoothly.

Often used in technical contexts such as manufacturing, robotics, or automotive engineering to describe ideal operational performance.

smooth operation

スムーズに稼働するphrase

operate smoothly

Pro Tip

Avoiding Overuse of 'スムーズ'

While 'スムーズに動く' is correct, in formal technical writing, consider using '円滑に動作する' or '順調に稼働する' to avoid sounding too casual. 'スムーズ' is a gairaigo (loanword) and may feel less professional in some contexts.

Gold Rule

Precision in Technical Contexts

When describing machinery, distinguish between 'スムーズに動く' (smooth motion) and '安定して動く' (stable operation). The former emphasizes lack of friction or resistance, while the latter emphasizes consistency over time.

Word Origin

The phrase combines: 機械 (kikai, 'machine'), が (subject marker), スムーズ (sumūzu, from English 'smooth' + Japanese suffix -s), に (adverbial particle), 動く (ugoku, 'to move'). The word 'スムーズ' entered Japanese in the early 20th century via English 'smooth' and evolved into an adverbial form '-s' to describe manner of action.

Usage Notes

Commonly used in technical documentation, manuals, or casual conversation about equipment performance. The adverb 'スムーズに' can be replaced with '円滑に' (enkatsu ni) in formal writing for a more technical tone.

Word Breakdown

機械

machine

noun

が

subject marker

particle

スムーズ

smoothly

adverb (loanword)

に

adverbial particle indicating manner

particle

動く

to move/operate

verb

和英辞典

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