inert
in-ert
adjective
Not chemically reactive; unable to combine with other elements.
"Argon is an inert gas used in welding."
adjective
Lacking power to move or act; very slow and inactive.
"The patient remained inert after the surgery."
Thesaurus
Synonyms: neutral, unreactive, indifferent, nonmoving, unmoving, inactive, sluggish, torpid, soggy