not sure
vs
uncertain

QUICK ANSWER

"Not sure" is an adjective which is often translated as "no seguro", and "uncertain" is an adjective which is often translated as "incierto". Learn more about the difference between "not sure" and "uncertain" below.

not sure(

nat

shuhr

)

An adjective is a word that describes a noun (e.g., the big dog).

adjective

1. (not certain)

a. no seguro

I'm not sure if I want the job.No estoy segura si quiero el trabajo.

b. no saber (verb phrase)

I'm not sure if this is a great idea.No sé si esto sea una gran idea.

2. (not confident)

a. no seguro

She is not very sure of herself.No es muy segura de sí misma.

uncertain(

uhn

ser

dihn

)

An adjective is a word that describes a noun (e.g., the big dog).

adjective

1. (in doubt)

a. incierto (future, outcome)

With consistent losses over the last seven quarters, the future of the company seems uncertain.Con pérdidas sostenidas durante los últimos siete trimestres, el futuro de la compañía parece incierto.

2. (lacking security)

a. no seguro

I'm uncertain about my direction in life.No estoy seguro sobre el rumbo de mi vida.

3. (hesitant)

a. indeciso (voice)

"I...I do have a question," he said in an uncertain tone."Yo...yo sí tengo una pregunta," dijo con voz indecisa.

b. vacilante (step)

The old man walked with uncertain step.El anciano caminaba con paso vacilante.

4. (changeable)

a. inestable (situation)

In such uncertain times, it's important to have a backup plan.En tiempos inestables como estos, es importante tener un plan B.

b. variable (weather)