simple - unadorned - straightforward - clear - unembellished - basic - modest - austere - stark - unpretentious - unvarnished - unelaborate - unornamented - homely - ordinary - unassuming - natural - unostentatious - pure - clean - neat - tidy - elementary - fundamental - primary - rudimentary - essential - uncomplex - uncomplicated - unrefined - unpolished - direct - candid - honest - sincere - genuine - real - true - authentic - unalloyed - unmodified - unaltered - unadulterated - untainted - unspoiled - unblemished - uncorrupted
The word 'plain' refers to something that is simple and not elaborate. It can describe a style, appearance, flavor, or manner that lacks ornamentation or complexity. For instance, a plain dress is one without any decorative elements, and plain food is food that is not seasoned or spiced. In literature or speech, plain language is straightforward and easy to understand without any embellishments.