indifferent

adjective

Having no particular interest or concern; apathetic.

adjective

Having no marked feeling for or against.

adjective

Not mattering one way or the other; unimportant; immaterial.

adjective

Characterized by a lack of partiality; unbiased.

adjective

Being neither too much nor too little; moderate.

adjective

Being neither good nor bad; mediocre: synonym: average.

adjective

Not active or involved; neutral.

adjective

Undifferentiated, as cells or tissue.