maybe

https://tts.langeek.co/read?text=bWF5YmU&hash=ead49483f09fa5e62d2d2e91a0224966824df4ca&lang=en&cache-only=0&driver=googletts&accent=US

probably

https://tts.langeek.co/read?text=cHJvYmFibHk&hash=717444a900add55bb7ae9d901bb3eff39c9340cc&lang=en&cache-only=0&driver=googletts&accent=US

tentatively

https://tts.langeek.co/read?text=dGVudGF0aXZlbHk&hash=44f69eb61b7f75a51f5627a169dca8259298f97c&lang=en&cache-only=0&driver=googletts&accent=US

feasibly

https://tts.langeek.co/read?text=ZmVhc2libHk&hash=f25c4afe43322ad4638f04c2e46bbe2f5335723d&lang=en&cache-only=0&driver=googletts&accent=US

perhaps

https://tts.langeek.co/read?text=cGVyaGFwcw&hash=e490e2b16bf511bedbcd2e503404f2aefa5c0fae&lang=en&cache-only=0&driver=googletts&accent=US

possibly

https://tts.langeek.co/read?text=cG9zc2libHk&hash=46643a7518e55675559dfb43d51876b1db33e1e6&lang=en&cache-only=0&driver=googletts&accent=US

potentially

https://tts.langeek.co/read?text=cG90ZW50aWFsbHk&hash=a1dc2efe2c84c944f0a740ceb63c3fbb61507ffe&lang=en&cache-only=0&driver=googletts&accent=US

(most|very) likely

https://tts.langeek.co/read?text=bW9zdCBsaWtlbHk&hash=f56dd732dddcbe2c24c5040968800caaab1a54f8&lang=en&cache-only=0&driver=googletts&accent=US

improbably

https://tts.langeek.co/read?text=aW1wcm9iYWJseQ&hash=1487597b7c52d3ed5d5154af8d23846dcac31456&lang=en&cache-only=0&driver=googletts&accent=US

impossibly

https://tts.langeek.co/read?text=aW1wb3NzaWJseQ&hash=f80c2f1babb2286ea974b8852371fcb528c6f4a8&lang=en&cache-only=0&driver=googletts&accent=US

reportedly

https://tts.langeek.co/read?text=cmVwb3J0ZWRseQ&hash=a5936c3ea3e534eaec5ef0bdb803a5d96593bc92&lang=en&cache-only=0&driver=googletts&accent=US

allegedly

https://tts.langeek.co/read?text=YWxsZWdlZGx5&hash=96214675174b69404f4082b5e951e2697fe2a62e&lang=en&cache-only=0&driver=googletts&accent=US

purportedly

https://tts.langeek.co/read?text=cHVycG9ydGVkbHk&hash=ecf9d492f0b60f81d3a395179c5b5d4da2270dba&lang=en&cache-only=0&driver=googletts&accent=US

conceivably

https://tts.langeek.co/read?text=Y29uY2VpdmFibHk&hash=56e79946236bcd0ff0cadf87c64fbcf0cf02ea7d&lang=en&cache-only=0&driver=googletts&accent=US

questionably

https://tts.langeek.co/read?text=cXVlc3Rpb25hYmx5&hash=020fca2d11eb822cf0666d38ef2853a29e1ec455&lang=en&cache-only=0&driver=googletts&accent=US

plausibly

https://tts.langeek.co/read?text=cGxhdXNpYmx5&hash=9cb200ce13fe41af57ed132ad27613bc43809616&lang=en&cache-only=0&driver=googletts&accent=US

These adverbs indicate that someone is not sure about their statement or opinion and only consider them possible, like "probably", "perhaps", "allegedly", etc.

Adverbios de incertidumbre

Adverbios en inglés que se refieren a "incertidumbre"

Adverbs of Uncertainty

English Adverbs Referring to "Uncertainty"