Tantum
Tantum is a Latin word meaning "only, merely" or "so much," used primarily as an adverb to limit a statement. In classical Latin it functions as an indeclinable adverb and is often paired with negation in the phrase non tantum sed etiam, meaning not only but also, to emphasize contrast. It can also occur in phrases that translate roughly as "that much" or "as much," serving as a quantitative modifier in some contexts, though it is chiefly adverbial.
In ecclesiastical Latin, tantum is well known through the liturgical lyric Tantum Ergo Sacramentum, attributed to
Etymologically, tantum derives from tantus "so great" or "such," sharing roots with modern Romance languages. The