1. (adj) no natural - her hair was a very unnatural colour: tenía el pelo de un color poco natural unusual

2. (adj) antinatural, contrario -ria a la naturaleza - that kind of behaviour is unnatural: ese comportamiento es antinatural freakish

3. (adj) afectado -da - she puts on an unnatural tone when talking to her customers: con sus clientes adopta un tono muy poco natural affected