The word "un subtlest" means lacking in subtlety or refinement. Some synonyms for this term include blatant, obvious, crude, gross, unrefined, and unsubtle. These words denote a lack of tact or delicacy in the approach to a situation. Additionally, words like brash, clumsy, rough, and clumsy can be used to convey a similar meaning. These synonyms can be used interchangeably while writing an article, story, or report to avoid overusing a particular term. Being mindful of word choice and using a variety of synonyms can enhance the clarity and effectiveness of the written work.