Undifferent vs. Indifferent

Difference Between Undifferent and Indifferent
Undifferentadjective
Not different.
Indifferentadjective
Not caring or concerned; uninterested, apathetic.
He was indifferent to the proposal, since it didn’t affect him, either way.Indifferentadjective
Indicating or reflecting a lack of concern or care.
She responded with an indifferent shrug.Indifferentadjective
Mediocre (usually used negatively in modern usage).
The long distance and the indifferent roads made the journey impossible.The performance of Blue Jays has been indifferent this season.Indifferentadjective
Having no preference or bias, being impartial.
I am indifferent between the two plans.Indifferentadjective
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.Indifferentadjective
(mechanics) Being in the state of neutral equilibrium.
Indifferentadjective
(obsolete) Not different, matching.
Indifferentadverb
(obsolete) 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...Indifferentadjective
marked by a lack of interest;
an apathetic audiencethe universe is neither hostile nor friendly; it is simply indifferentIndifferentadjective
showing no care or concern in attitude or action;
indifferent to the sufferings of othersindifferent to her pleaIndifferentadjective
(usually followed by `to') unwilling or refusing to pay heed;
deaf to her warningsIndifferentadjective
(often followed by `to') lacking importance; not mattering one way or the other;
whether you choose to do it or not is a matter that is quite immaterial (or indifferent)what others think is altogether indifferent to himIndifferentadjective
fairly poor to not very good;
has an indifferent singing voicehas indifferent qualifications for the jobIndifferentadjective
having only a limited ability to react chemically; not active;
inert matteran indifferent chemical in a reactionIndifferentadjective
marked by no especial liking or dislike or preference for one thing over another;
indifferent about which book you would give themwas indifferent to their acceptance or rejection of her invitationIndifferentadjective
characterized by a lack of partiality;
a properly indifferent juryan unbiased account of her family problemsIndifferentadjective
neither good nor bad;
an indifferent performancea gifted painter but an indifferent actorher work at the office is passablea so-so golferfeeling only so-soprepared a tolerable dinnera tolerable working knowledge of FrenchIndifferentadjective
neither too great nor too little;
a couple of indifferent hills to climb