unquestionably

From unquestionable +‎ -ly or un- +‎ question +‎ -ably.

• (US, UK) IPA^(key): /ʌnˈkwɛs.t͡ʃən.ə.bli/

• Audio (US):

  (file)

• (older RP) IPA^(key): /ʌnˈkwes.t͡ʃən.ə.blɪ/

unquestionably (comparative more unquestionably, superlative most unquestionably)

1. Without question; beyond doubt; indubitably.
   • 1941, George Orwell, The Lion and the Unicorn:

     It is a strange fact, but it is unquestionably true that almost any English intellectual would feel more ashamed of standing to attention during “God save the King” than of stealing from a poor box.

   • 2025 November 25, Segun Dukeh, “Who Stopped the Killing of Twins in Nigeria?”, in The Guardian‎^[1]:

     Mary Slessor wasn’t technically the first missionary to oppose twin killing in Calabar, but she was unquestionably the most effective and relentless.

2. (informal) OK, right-on

• questionably
• unquestionable

• undoubtedly
• doubtlessly