How to Say "jointly" in Spanish
The Spanish word for “jointly” is “juntas” — A1 level. This is a very common word in everyday Spanish.

Examples
Las hermanas viven juntas en Madrid.
The sisters live together in Madrid.
Aunque somos de países diferentes, trabajamos juntas en el proyecto.
Although we are from different countries, we work together on the project.
Las dos mesas estaban juntas para formar una grande.
The two tables were joined (or put together) to form a large one.
Matching the Group
When using 'juntas' to mean 'together,' remember the ending must match the group. If the group has at least one male or mixed genders, you must use the masculine plural form: 'juntos'.
Adverb vs. Adjective
This word often acts like an adverb (explaining how an action is done: 'trabajar juntas'), but it can also be an adjective (describing a noun: 'mesas juntas').
Gender Misuse
Mistake: “Mis amigos y yo vivimos juntas.”
Correction: Mis amigos y yo vivimos juntos. (Use 'juntos' because the group includes males/mixed genders.)
Related Translations
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