The word 'worth' originates from the Old English 'weorþ', meaning "equal in value to" or "deserving." This term is derived from the Proto-Germanic 'werþaz', which conveyed the sense of "toward" or "opposite," and by extension, "equivalent, worth." This Proto-Germanic root can be traced further back to the Proto-Indo-European 'wert-', meaning "to turn, wind." The conceptual link is that of turning toward something, implying an exchange or equivalence of value. Over centuries, the sense of "turning" evolved into the abstract concept of "value" or "deservingness," solidifying in English as a primary term for expressing merit and equivalence.

The word 'worth' is a simplex word of Germanic origin. It functions as a core adjective and noun in Modern English.