Virtual essence, virtual

It's an adjective

These two words have the same suffix. The actual phonetic symbol t∫ pinyin reads ch.

E write backwards with phonetic symbols; The e in pinyin.

L finally pronounce ou in pinyin, but this sound is weak.

A in ac reads Pinyin, A in ai, C in Pinyin and K in Pinyin.

V reads w in pinyin, and ir reads e in pinyin.

It is ok to put it together as a whole.