From Latin decorātus + -ive.

• (RP) IPA: /ˈdɛk.ə.ɹə.tɪv/, /ˈdɛk.ɹə.tɪv/
• (America) IPA: /ˈdɛk.ə.ɹə.tɪv/, [ˈdɛk.ə.ɹə.ɾɪv], /ˈdɛk.ɹə.tɪv/, [ˈdɛk.ɹə.ɾɪv]
• (Australia) IPA: /ˈdek.ə.ɹə.tɪv/

decorative

1. That serves to decorate
   • 2014, Tim Carvell [et al.], “Dr. Oz and Nutritional Supplements”, in Last Week Tonight with John Oliver, season 1, episode 8, John Oliver (actor), Warner Bros. Television, via HBO:

     And I’ll be honest. I’ll be honest, seeing stories like that is enough to make me glad that the Queen of England is mostly decorative now. In fact, the most relevant thing she’s done recently was announced that this week, she’s going to visit the Game of Thrones set.

• French: décoratif
• German: dekorativ
• Italian: decorativo
• Portuguese: decorativo
• Russian: декорати́вный
• Spanish: decorativo

decorative (plural decoratives)

1. A plant, tile, etc. intended for use as decoration.