1 (doubtful, undecided) to be unsure about/of sth no estar seguro de algo he seemed very unsure about it no parecía estar muy seguro de ello
I like the jacket but I'm unsure about the skirt if you're unsure about anything, ask to be unsure [of] sth
she looked at him, unsure of his reaction lo miró, sin estar segura de su reacción; he was unsure of his welcome no estaba seguro de la bienvenida que recibiría
I was unsure of the dosage if you're unsure of your size, measure yourself
I was unsure what to expect no estaba segura de qué esperar
he was unsure whether he would be able to do it no estaba seguro de si sería capaz de hacerlo
2 (lacking confidence) inseguro; poco seguro she seemed nervous and unsure parecía nerviosa e insegura; parecía nerviosa y poco segura
His jaw was set, but his voice sounded thin and unsure
to be unsure of o.s. no estar seguro de uno mismo; no tener confianza en sí mismo
3 (unreliable) [+situation, economic climate] poco seguro; [+loyalty, commitment] poco fiable there were many men of unsure loyalty in this unsure financial climate it would be imprudent to take risks
