PERIODIC Antonyms

• liable to sudden unpredictable change

• having no fixed course

• likely to perform unpredictably

• contrary to rule or accepted order or general practice

• (used of the military) not belonging to or engaged in by regular army forces

• (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement

• a member of an irregular armed force that fights a stronger force by sabotage and harassment

• merchandise that has imperfections; usually sold at a reduced price without the brand name

• not occurring at a regular rate or fixed intervals

• failing to meet a standard of manufacture due to an imperfection

• deviating from normal expectations; somewhat odd, strange, or abnormal

• lacking continuity or regularity

• (of a surface or shape); not level or flat or symmetrical

• independent in behavior or thought

• not recurring at regular intervals

• lacking any definite plan or order or purpose; governed by or depending on chance

• recurring in scattered and irregular or unpredictable instances

• not capable of being foretold

• unknown in advance

• not occurring at a regular rate or fixed intervals