lubricate
🇺🇸
/ˈluːbrɪkeɪt/
🇬🇧
/ˈluːbrɪkeɪt/
to apply oil or grease to make parts move smoothly
You should lubricate the bicycle chain regularly to keep it running quietly.
自転車のチェーンを定期的に油を差すべきで、静かに動かすために。