He rambled aimlessly through the forest, lost in thought.
about nothing
Frequency:
60
%
He tends to ramble about nothing when he's nervous.
incoherently
Frequency:
50
%
After a few drinks, he started rambling incoherently.
on and on
Frequency:
45
%
She kept rambling on and on about her vacation.
Idiomatic Expressions for ramble
Phrase: ramble on
Meaning: to talk at length in a wandering or unfocused manner
Usage: He tends to ramble on when he gets excited about a topic, making it hard to follow his train of thought.