Negative:
* Small and insignificant: Gnats are tiny insects, often seen as being of little importance or consequence. This can extend to metaphorical uses, where something is dismissed as "not even worth a gnat's whisker."
* Annoying and bothersome: Gnats are known for their buzzing and tendency to bite or sting. They can be quite irritating, leading to the phrase "straining at a gnat" which describes someone overly concerned with small matters.
* Pesky and persistent: Gnats are often seen as difficult to get rid of, clinging to their chosen space and returning even after being swatted away.
* A source of disease: Some gnats are vectors for diseases, adding to their negative connotation.
Neutral:
* Tiny insect: This is the most neutral meaning, simply referring to the physical characteristics of the creature.
* Symbol of fragility: Due to their small size, gnats can be used as a symbol of something fragile and easily broken.
Positive:
* Natural part of the ecosystem: Gnats play a role in the natural world, serving as food for other creatures and aiding in pollination. However, this is not a common connotation.
It's important to remember that connotations can vary depending on the context and the speaker's intentions.