opportune

 
Pronunciation: /ˈɒpətjuːn, ˌɒpəˈtjuːn/

adjective

  • (of a time) especially convenient or appropriate for a particular action or event: he couldn’t have arrived at a less opportune moment
  • done or occurring at a favourable time; well timed: the opportune use of humour to lower tension

Derivatives

opportunely

adverb

opportuneness

noun

Origin:

late Middle English: from Old French opportun(e), from Latin opportunus, from ob- 'in the direction of' + portus 'harbour', originally describing the wind driving towards the harbour, hence 'seasonable'