His outward behavior suggested he was hiding something.
outward expression
Frequency:
60
%
Her outward expression of joy was contagious.
outward sign
Frequency:
50
%
The dark clouds were an outward sign of an approaching storm.
Idiomatic Expressions for outward
Phrase: outwardly calm
Meaning: appearing calm on the surface despite inner turmoil
Usage: She remained outwardly calm during the crisis, but inside she was panicking.