first

primero, inicial

Que llega o sucede antes que todos los demás.

En inglés sencillo: Coming or happening before all the others.

• This is my first bike.
• He won first prize.
• Who was the first person to call?

Cómo se usa: the first to do something (She was the first to arrive.)

Sinónimos: earliest, initial

Antónimos: last

Expresiones frecuentes: first time, first day, first place, first child

principal, primero

Que tiene más importancia o es mejor que los demás.

En inglés sencillo: More important or better than the others.

• Safety is our first priority.
• Her first duty is to protect the children.
• This hotel would be my first choice.

Sinónimos: main, chief, primary, best

Antónimos: last

Expresiones frecuentes: first priority, first duty, first choice, first concern

primero

Numerado con el uno, después del cero, en un sistema que empieza a contar desde cero.

En inglés sencillo: Numbered one, just after the item numbered zero, in a system that starts counting at zero.

• The first index follows index zero.
• Here, the first element comes after the zeroth element.
• The programmer placed a marker at the first position, immediately after position zero.

Expresiones frecuentes: first index, first element, first entry

primero, antes

Antes que cualquier otra persona, cosa o acción.

En inglés sencillo: Before any other person, thing, or action.

• Wash your hands first.
• She arrived first and chose a seat.
• Who wants to go first?

Sinónimos: beforehand, firstly

Antónimos: last

Expresiones frecuentes: come first, finish first, first of all, put someone first

por primera vez

En la primera ocasión en que ocurrió algo.

En inglés sencillo: On the earliest occasion when something happened.

• We first met at school.
• I first heard that song last summer.
• When did you first visit this city?

Sinónimos: for the first time

Expresiones frecuentes: first meet someone, first hear something, first visit somewhere

al principio, inicialmente

Al comienzo de una situación o un período.

En inglés sencillo: At the beginning of a situation or period.

• It was hard when we first moved here.
• When she first started, she needed help.
• We had little money when we were first married.

Sinónimos: initially, at the beginning

Expresiones frecuentes: first start work, first move in, first get married

primero

La persona o cosa que viene antes que todas las demás.

En inglés sencillo: The person or thing that comes before all the others.

• I was the first in line.
• The first of the guests arrived early.
• Who was the first to finish?

Cómo se usa: the first to do something (He was the first to sign up.); the first of something (This is the first of three reports.)

Sinónimos: earliest one

Antónimos: last

Expresiones frecuentes: the first of something, the very first, among the first

primicia, hito

Algo que ocurre o se hace por primera vez.

En inglés sencillo: Something that happens or is done for the earliest time ever.

• That's a first for me.
• The successful flight was a world first.
• Her victory marked a historic first for the team.

Cómo se usa: a first for someone/something (Winning this award was a first for our school.)

Sinónimos: first occurrence

Expresiones frecuentes: a world first, a historic first, a first for someone