indifferent

A person who is indifferent or apathetic.

Not caring or concerned; uninterested, apathetic.

“He was indifferent to the proposal, since it didn’t affect him, either way.”

Indicating or reflecting a lack of concern or care.

“She responded with an indifferent shrug.”

Mediocre (usually used negatively in modern usage).

“The long distance and the indifferent roads made the journey impossible.”

Having no preference or bias, being impartial.

“I am indifferent between the two plans.”

Not making a difference; without significance or importance.

“Even if one appliance consumes an indifferent amount of energy when left on stand-by overnight, together they can represent 10% of the electricity demand of a household.”

Being in the state of neutral equilibrium.

Not different, matching.

To some extent, in some degree (intermediate between very and not at all); moderately, tolerably, fairly.

“The face of the Moon appearing to me to be full of indifferent high mountains...”