half-hearted
Alexa protested, but extremely half-heartedly.
After the war he returned, half-heartedly, to journalism.
I laugh half-heartedly when the agent jokes about me being his bodyguard for a day.
The police only half-heartedly searched for the stolen car, assuming that it had probably already been cut up for parts.
He only halfheartedly looks for jobs by filling out forms on the internet.

SMART Vocabulary: related words and phrases

Lacking interest and enthusiasm
apathetic
apathy
aridity
blah
blankly
half-hearted
hell
incurious
incuriously
nonchalant
nonchalantly
nonconcern
passionless
politely
unmotivated
unromantically
unserious
unseriousness
vacant
your heart isn't in itidiom