Analyse or analyze: which is correct?

Correct
analyse (UK) / analyze (US)
Avoid
analyze (in UK English)
Avoid
analyse (in US English)
Summary

Correct: analyse (UK) / analyze (US) — Avoid: analyze (in UK English) / analyse (in US English). Analyse / analyze = to examine something methodically in order to explain or interpret it. The noun analysis is spelled the same way everywhere.

Both spellings are correct in their own variety; pick one and use it consistently.

Part of speech
verb
Source
Oxford / Merriam-Webster

Why

Oxford: analyse, paralyse and catalyse keep -yse in British English even in Oxford spelling, because they derive from the Greek noun analysis rather than from a verb in -izein; Merriam-Webster gives analyze, paralyze and catalyze as American standard.

Examples

  • We need to analyse (UK) / analyze (US) the survey results.
  • The lab analysed the water sample within a day.
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Checked against
Merriam-Webster / Oxford
Spelling authority
Merriam-Webster · Oxford English Dictionary / Oxford spelling · SCOWL
Commonly confused and non-standard forms
64
Dictionary
Hunspell en_US / en_GB / en_AU / en_CA · Dictionary license: MIT AND BSD (SCOWL combined licence)