sweh₂d-
“sweet, pleasant”sweet
Root for sweetness. Gives English "sweet", Latin suāvis, Greek hēdús, Sanskrit svādú.
Discussion
The Proto-Indo-European root *sweh₂d- meant "sweet, pleasant" and is one of the clearest cases of a root whose core meaning has remained remarkably stable across thousands of years and multiple language branches. The laryngeal *h₂ coloured the adjacent vowel and contributed to the long vowel seen in many reflexes.
In Germanic, the root produced Old English swēte, the direct ancestor of modern English sweet. Grimm's Law had no effect on the initial *sw- cluster, which passed through unchanged, making the connection between the Proto-Indo-European form and the modern English word unusually transparent. The word has maintained its primary gustatory sense throughout its history while also developing metaphorical extensions — sweet music, sweet temper, sweet nothings — that echo the original breadth of "pleasant".
Latin took the root in a somewhat different semantic direction. The adjective suavis "pleasant, agreeable" (from earlier *swādwis) gave English suave, originally meaning "sweet" or "agreeable" before narrowing to its modern sense of polished sophistication. More productively, the Latin verb suadēre "to urge, to recommend" — literally "to make sweet, to make palatable" — produced English persuade, dissuade, and assuage. The connection between sweetness and persuasion reveals an Indo-European metaphor: to convince someone is to make an idea taste sweet.
Sanskrit svādu- "sweet, pleasant" is a transparent cognate, and the Greek hēdys "sweet, pleasant" (from *swādus with regular loss of initial s before w) gave English hedonism and hedonist. The semantic range across these branches — from literal sweetness through pleasantness to persuasion and pleasure-seeking — maps neatly onto a single conceptual core: that which is agreeable to the senses.
The root *sweh₂d- thus offers a window into Proto-Indo-European sensory vocabulary and the metaphorical thinking that extended taste terms into the realms of rhetoric and moral philosophy.
Notes
Source of "suave", "persuade", "hedonic"
Related Roots
English Words from *sweh₂d-
These modern English words descend from this root. Each page traces the full journey from PIE to present-day English.