A word used to indicate that something is believed to be true, though not definitely known or confirmed
Examples:
The Universe supposedly replies through several techniques.The relic supposedly holds ancient magical powers.Supposedly, he will arrive by noon tomorrow with the documents.
Synonyms:
Antonyms:
Supposably
Used to describe something that is assumed or claimed to be true but might not be.
Examples:
Supposably, the package will arrive by next Monday.The event is set to start at 7 PM, supposably.Supposably, the meeting was canceled last minute.
Synonyms:
Antonyms:
Ways to tell them apart:
Supposedly is the correct form and widely accepted in standard English.
Supposably is considered a nonstandard variant and is often labeled incorrect.
Remember supposedly relates to suppose which is about assuming or presuming something as true.
Supposably might be remembered by its ending as being capable of being supposed, though this use is rare.
If you want to be sure you are using the standard form, stick with supposedly.