likely to become different

erratic

not continuous

broken; intermittent

(of speech and writing) not having a good order or plan

loose, disconnected

(of a person, behaviours) likely to do unusual or unexpected things

unpredictable; wandering

(of a person) often changing one's feelings about another person

vacillating, blowing hot and cold

not in harmony or agreement; out of place

out of place; absurd

pausing or stopping at intervals

irregular, sporadic

contrary to rules, to what is normal and established

random, variable

of the nerves; easily afraid, timid

anxious, fearful

never still or quiet

not content; moving about

happening during a particular season; changing with the seasons

irregular, sporadic

irregular; happening in, affected by, spasms

twitching, erratic

happening occasionally

on and off

not reliable; not certainly knowing or known

doubtful, changeable

not similar in size, quality etc; (of a surface) not level, not smooth

not smooth or balanced

(of a person, condition) not stable

doubtful

varying; changeable; a quantity or thing (e.g. cost, temperature) that can change according to conditions

changing, changeable

wavy

doubtful, weak