EUSKALTERM is an excellent free English-to-Basque dictionary. It
serves as a multilingual terminology bank (also in French, Spanish
and Latin). The subject-based online database allows you to translate
words in a wide variety of technical areas.
On this Internet site, you can find a free online bilingual dictionary
that allows you to translate English words into Basque.
On the Freelang site, you will find a free translation dictionary
from English to Basque, which you can consult online or download.