Translation guide
The English word 'excavator' most commonly refers to a heavy construction vehicle with a digging bucket. In Japanese, this is usually ショベルカー or 油圧ショベル. The word can also refer to a person who excavates, or to a dental/archaeological tool, but these are less common.
The most common meaning: a large machine with a bucket for digging earth, used at construction sites.
The most common and widely understood term for an excavator in everyday Japanese. It is a wasei-eigo (Japanese-made English) word combining 'shovel' and 'car'.
An excavator is digging earth at the construction site.
A more technical term, literally 'hydraulic shovel'. Often used in official contexts, manuals, or by industry professionals.
A license is required to operate a hydraulic excavator.
Another common term, similar to ショベルカー. Often used interchangeably, though some may distinguish it as a larger machine.
That excavator is very large.
A brand name (from the French company Yumbo) that became a genericized trademark for excavators, especially in the Kansai region. It is casual and may not be understood nationwide.
Dig a hole with an excavator.
A person who digs, especially as a job, such as an archaeologist or construction worker.
A small tool used for digging or scraping, such as a dental excavator or an archaeological pick.
A direct loanword from English, used in specialized contexts like dentistry. Not commonly understood by the general public.
The dentist removed the cavity with an excavator.
The direct translation '掘削機' (くっさくき) exists but is rarely used for the common construction vehicle. It sounds overly technical and may refer to any digging machine, not specifically the tracked vehicle with a bucket. Stick with ショベルカー or 油圧ショベル for natural Japanese.
excavator (generic digging machine, not recommended for the vehicle)
Excavators are engaged in tunnel construction.