B - Bicycle, Butter, Bio..., Bible.

Bicycle. From the Latin bi-, which means "two" and‎ Ancient Greek κύκλος, kuklos, circle, wheel. A vehicle that has two wheels, one behind the other, a steering handle, and a seat or seats and is usually propelled by the action of a rider’s feet upon pedals.

Butter. From Ancient Greek βούτῡρον, boútȳron, cow cheese. Compound of βοῦς, boûs, ox, cow and τῡρός, tyrós, cheese. A soft, fatty foodstuff made from the cream of milk (generally cow's milk).

Bio... The prefix bio- comes from the Ancient Greek word βίος, veos, which means life. Thus, every word with bio- as prefix has Greek roots.

Derived or related words: biology, biochemistry, bionic, biotechnology, biological, biosynthesis, biorhythm, biotic, biopsy etc.

Bible. From Ancient Greek βιβλίον, vevleon, small book, originally a diminutive of βίβλος, vevlos, book. A comprehensive manual that describes something.

Derived or related words: bibliography, biblical.