necessary

needed or wanted because it is important, useful, or essential

necesario, indispensable

• be necessary for something/somebody

Collocations necessary equipment · it is necessary to do sth

• It's necessary to wear a helmet when riding a bike.

  Es necesario llevar un casco al montar en bicicleta.

required by law or rules; obligatory

obligatorio, requerido por ley

• be necessary for something/somebody

Collocations necessary legal procedures · it is necessary to do sth

• It's necessary to file a tax return by April 15th.

  Es necesario presentar la declaración de impuestos antes del 15 de abril.

useful or helpful, but not essential; desirable but not required

útil, conveniente

• be necessary for something/somebody

Collocations necessary information · it is necessary to do sth

• It's not strictly necessary, but it would be useful.

  No es estrictamente necesario, pero sería útil.