'Pray' in the Bible

Judge for yourselves: Is it proper for a woman to pray to God with her head uncovered?

Therefore the person who speaks in another language should pray that he can interpret.

For if I pray in another language, my spirit prays, but my understanding is unfruitful.

What then? I will pray with the spirit, and I will also pray with my understanding. I will sing with the spirit, and I will also sing with my understanding.