Answer:
Idiom.
Explanation:
A literary device can be defined as any technique used by speakers and authors (writers) to significantly emphasize on their writeups or compositions and express their ideas, opinions or thoughts to the audience.
The main purpose of a literary device is to convey more information and enable the readers or listeners have a deeper understanding of the piece. Some of the literary device used in English literature are; exposition, resolution, plot, paradox, soliloquy, setting, tragedy, comedy, epiphany, theme, falling action, rising action, simile, metaphor, parody, utopia, anecdote, pseudonym, essay, analogy, hyperbole, oxymoron, personification, pun, sarcasm, contrast, connotations, genre, fiction, epic, inference, foreshadowing, idiom, etc.
An idiom can be defined as an everyday language that is not meant to be taken literally.
Basically, idioms are phrases that may be impossible to interpret or difficult to understand based on a loose translation of the words contained therein. Therefore, idioms shouldn't be interpreted literally but in a figurative sense.
Some examples of common idioms and there meaning include the following;
I. Make hay while the sun shine: it means you should act when an opportunity is presented and while you're still active.
II. Love is blind: it simply means a true and genuine love isn't superficial i.e based on the physical or material things.