Form negative adjectives. Use non-, dis-, un-, im-, in-, il-, ir-: Existent- Satisfied-...

Question

Form negative adjectives. Use non-, dis-, un-, im-, in-, il-, ir-:
Existent-
Satisfied-
Accurate-
Helpful-
Possible-
Formal-
Logical-

Answer 1

Non-existent
un-/dis-satisfied
inaccurate
unhelpful
impossible
informal
illogical