Bedeutung von “doubtful” im Essential American English Dictionary

doubtful

adjective us /ˈdɑʊt·fəl/

If something is doubtful, it probably will not happen:

It’s doubtful whether he’ll be able to come.

not feeling certain about something:

The teacher is doubtful about having parents working as classroom assistants.

(Definition von “doubtful” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)