conjointly

Conjointly is an adverb meaning together, jointly, in combination, or in concert. It is used to describe actions, effects, or processes that arise when two or more factors act in tandem. In contemporary usage, “jointly” is more common in everyday language, while “conjointly” tends to appear in formal, academic, or legal writing.

Etymology follows the word’s components: it derives from conjoint, meaning joined, which comes from Latin coniunctus, the past participle of coniungere “to join together.” The suffix -ly converts the adjective into an adverb, yielding conjointly to express simultaneous action or influence.

In practice, conjointly is often found in technical or analytical contexts. For example, researchers may say that two variables influence an outcome conjointly, or that two agencies funded a project conjointly. The term highlights an interdependent or co-acting relationship beyond mere simultaneity, though it can often be substituted with “jointly” without loss of meaning.

Conjointly should not be confused with related terms. Conjoined refers to something physically joined, such as conjoined twins. Conjunctive or conjunctively relates to logical or grammatical connections. Conjoint may function as an adjective meaning joined or combined, whereas conjointly functions strictly as an adverb describing how actions occur.

See also: conjoint, conjoined, conjunctive, jointly, conjunction.