Tian
The word "Tiān" means heaven in Chinese. The modern character for "Tiān" is made up of two parts, "dà" which means "big" or "great", and "yī"  which means "one". In the past, the character for "Tiān" was made to look like a person with a big head. Some old characters even show the person with their arms stretched out, looking big and important. The ancient characters for "Tiān" also had a round or square head, or a head marked with one or two lines. This might suggest that the original meaning was "a powerful deity", not just the sky.