Indifferent

marked by a lack of interest

showing no care or concern in attitude or action

(usually followed by `to') unwilling or refusing to pay heed

(often followed by `to') lacking importance

fairly poor to not very good

having only a limited ability to react chemically

marked by no especial liking or dislike or preference for one thing over another

characterized by a lack of partiality

being neither good nor bad

neither too great nor too little