non-poisonous
The prefix of "poisonous" is "poi-", which means poison or toxin.
The opposite prefix of the prefix "meta-" is "pre-".
The prefix "non-" must be added to form the word "non-poisonous."
Hypo is the opposite of the prefix hyper.
The opposite prefix for personal is "impersonal."
The opposite of median with a prefix is "nonmedian."
The opposite of active using a prefix is "inactive."
The prefix for the opposite of order is "dis-" or "un-".
The opposite of "thoughtful" with a prefix would be "thoughtless."
The opposite prefix of "essential" is "non-essential."
Non
The opposite of judge using a prefix is misjudge.