Hopelessly insensible or stupid; not easily aroused or excited; dull; impassive; foolish.
source: Webster 1913
adjective satellite
having or revealing little emotion or sensibility; not easily aroused or excited
Her impassive remoteness. He remained impassive, showing neither interest in nor concern for our plight. A silent stolid creature who took it all as a matter of course. Her face showed nothing but stolid indifference.