twenty, twenty or letter H radical (no. 55)
廾 represents the number twenty, formed by two tens joined together. It also serves as a radical component in other characters, sometimes called the 'letter H' radical due to its shape.
廾 is a pictograph of two hands (十 and 十) joined together, representing the number twenty. The modern form preserves this joined-hands shape.
Picture two hands with ten fingers each, pressed together to make twenty. The shape 廾 looks like two 十 (ten) characters side by side.
For キョウ, imagine twenty people in a row, all shouting 'kyou!' together. The sound 'kyou' cues キョウ while the twenty people match the meaning.