Phonestheme

A Phonestheme is consonant cluster apparently associated with a particular semantic field, but with no distinguishable independent meaning.

Some examples:

English phonaestheme “gl-” occurs in a large number of words relating to light or vision, like “glitter”, “glisten”, “glow”, “gleam”, “glare”, “glint”, and so on.

Also, “sn-“, related to the mouth or nose, as in “snarl”, “snout”, “snicker”, “snack”, and so on, and “sl-“, which appears in words denoting frictionless motion, like “slide”, “slick”, “sled”, and so on.

While phonesthemes have mostly been identified in the onsets of words and syllables, they can have other forms.

There has been some argument that endings like “ash” and “ack” in English also serve as phonesthemes, due to their patterning in words that denote forceful, destructive contact (“smash”, “crash”, “bash”, etc.) and abrupt contact (“smack”, “whack”, “crack”, etc.), respectively.

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Shortest and Longest Word

Shortest word should be “a” or “I” naa… Or prolly there are words that are half sounding…

Longest one according to Wiki is
Pneumonoultramicroscopicsilicovolcanoconiosis .

Thats 45 letters. There are longer words but are not recognized by most dictionaries.

Pneumonoultramicroscopicsilicovolcanoconiosis
a lung disease caused by breathing in particles of siliceous volcanic dust.
This is the longest word in any English dictionary. However, it was coined by Everett Smith, the President of The National Puzzlers’ League, in 1935 purely for the purpose of inventing a new “longest word”. The Oxford English Dictionary described the word as factitious. Nevertheless it also appears in the Webster’s, Random House, and Chambers dictionaries.