adv · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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CMU ARPABET:AH0 S IH1 D W AH0 S L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adv
Meaning 1
In an assiduous manner; diligently, industriously.
Definition source: English Wiktionary via Wiktextract
Examples
2020, Frank Bowman, The role of the chief justice in an impeachment trial, SCOTUSblog (Jan. 10, 2020, 11:18 AM), online What little precedent we have in such cases suggests that chief justices keep their heads down and, so far as possible, defer assiduously to the will of the Senate majority.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adverb
Meaning 2
with care and persistence
Definition source: Princeton WordNet 3.0
Examples
she worked assiduously on the senior thesis
Meaning relationships
Synonyms: none provided
Antonyms: none provided
History
Etymology
Etymology tree English assiduous Middle English -ly English -ly English assiduously From assiduous + -ly.
Across languages
Translations
11 source translations are retained for this English entry.
Catalan:
assíduament
— in an assiduous manner
Dutch:
volhardend
— in an assiduous manner
Dutch:
ijverig
— in an assiduous manner
Dutch:
vlijtig
— in an assiduous manner
French:
assidûment
— in an assiduous manner
Greek:
επιμελώς
(epimelós)
— in an assiduous manner
