Translation guide
Expresses that something is absolutely necessary or essential. Japanese uses various adjectives, verbs, and set phrases depending on the nuance.
To say that something is so important that you cannot manage without it.
Literally 'cannot omit/neglect'. A very common and natural way to say something is indispensable.
Water is indispensable for life.
He is indispensable to this project.
Literally 'if it doesn't exist, it won't do'. A strong, common expression for necessity.
A dictionary is indispensable for language learning.
A more formal compound meaning 'necessary and indispensable'. Often used in writing or speeches.
This element is indispensable for success.
Means 'mandatory' or 'essential'. Often used for requirements, items, or conditions.
This document is indispensable for the application.
To emphasize that something is a must, often in a more casual or emphatic way.
To express that someone or something is so valuable that nothing else can take its place.
Both mean 'indispensable', but 欠かせない is slightly more common in everyday speech and writing. なくてはならない can sound a bit more emphatic or formal. They are often interchangeable.
Health is indispensable for happiness.
Health is indispensable for happiness.
The English word 'indispensable' is often translated directly as 不可欠な (ふかけつな), but this can sound stiff or overly formal in casual conversation. Use 欠かせない or なくてはならない for natural speech.
This tool is indispensable for my work.
Good communication is indispensable in a team.
Means 'irreplaceable' or 'precious'. Often used for loved ones or cherished things.
Family is indispensable.