adjective
likely, probable, probably
A2
'wahrscheinlich' means likely, probable (adjective) and probably (adverb). Use it to express probability. It's gradable: comparative 'wahrscheinlicher', superlative 'am wahrscheinlichsten'. Antonym: unwahrscheinlich. No specific preposition. As adjective it agrees in declension when used attributively; often used predicatively or adverbially without inflection.
Examples
Die Ärzte erklärten, dass die Ursache wahrscheinlich genetisch war, obwohl noch weitere Tests nötig gewesen wären.
The doctors explained that the cause was probably genetic, although further tests would have been necessary.
Das Ergebnis ist ziemlich wahrscheinlich.
The result is quite probable.
Es ist wahrscheinlich, dass er später anruft.
He's likely to call later.
Details
Mnemonics
picture a scale tipping toward one side labeled 'wahrscheinlich'
sounds a bit like 'what finally' — think 'what finally seems to be the case'
not applicable
Notes
Can function as adjective ('likely') or adverb ('probably'). Common in spoken and written language.