1. (adverb) not easy to believe

• implausibly
• improbably
• incredibly

1. (adverb) not easy to believe

• believably
• believably
• credibly
• plausibly
• probably

2. (adverb) in an unbelievable manner

• believably

1. (adverb) not easy to believe

• implausible
• improbable
• marvellous
• marvelous
• tall
• incredible
• incredible
• unbelievable
• unbelievable

2. (adverb) in an unbelievable manner

• incredible
• unbelievable