# assiduous

> English word · Adjective · IPA /əˈsɪdjuːəs/ · frequency rank #79,273

## Definitions
1. Hard-working, diligent or regular (in attendance or work); industrious.

## Etymology
A learned borrowing from Latin assiduus, from assidere (“to sit down to”), from ad- (“to”) + sedere (“to sit”). Compare sedulous.
Cognate (via assidere) to assess.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/assiduous