English translation of 'अर्थात्'
1. namely adverb
You use namely to introduce more detailed information about what you have just said.
One group has been forgotten, namely pensioners.
2. say (in phrases)
You use that is to say to indicate that you are about to express the same idea more clearly.[formal]
Good writers are those who keep the language efficient. That is to say, keep it accurate, keep it clear.
3. that (in phrases)
You use that is or that is to say to indicate that you are about to explain something more clearly, more specifically, or in more detail.
Productivity — that is, the output of every employee — has not increased.
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Translation of अर्थात् from the Collins Hindi to English Dictionary