Balm is a word steeped in the aromatic resins of the ancient Near East. It enters English from Old French basme (later baume), which descended from Latin balsamum, borrowed from Greek balsamon. The Greek word itself came from a Semitic source — likely Hebrew bāśām or bośem, meaning "spice," "perfume," or "balsam." The word's journey from Semitic to Greek to Latin to French to English traces one of the great trade routes of the ancient world: the traffic in precious aromatics from Arabia and East Africa into the Mediterranean basin.
The most famous balsam in Western culture is the "Balm of Gilead," referenced in Jeremiah 8:22: "Is there no balm in Gilead? Is there no physician there?" This was likely the resin of Commiphora gileadensis (sometimes identified as C. opobalsamum), a small tree native to the southern Arabian Peninsula and the Horn of Africa. In antiquity, this resin was extraordinarily valuable — ancient sources report that it sold for twice its weight in silver. The region of Gilead, east of the Jordan River, was famed for its production, and the balsam trade was a significant source of wealth for successive rulers
English balm lost the 's' that its Latin ancestor balsamum possessed, a simplification that occurred in Old French. The fuller form survives in English "balsam," used for both the resin and the plants that produce it (including the garden flower Impatiens balsamina). "Embalm" — to preserve a corpse with aromatic substances — preserves the root in a related form, reminding us that balms served the dead as well as the living.
The figurative use of balm as emotional or spiritual comfort emerged early, by the 14th century. To describe kind words as "a balm to the soul" draws on the ancient association between fragrance, healing, and divine favor. In many ancient cultures, pleasant scent was associated with sanctity — the "odor of sanctity" that supposedly accompanied the deaths of saints. Balm occupies this intersection of the physical and spiritual.
Modern derivatives include "balmy," which means pleasantly warm and fragrant (describing weather), and — in British slang — "barmy," meaning crazy, though this latter word likely comes from "barm" (yeast froth) rather than balm. Lip balm, the ubiquitous personal care product, preserves the word's oldest practical sense: a soothing substance applied to damaged skin.