What's the difference between how and yow?

How

Definition:

• (adv.) In what manner or way; by what means or process.
• (adv.) To what degree or extent, number or amount; in what proportion; by what measure or quality.
• (adv.) For what reason; from what cause.
• (adv.) In what state, condition, or plight.
• (adv.) By what name, designation, or title.
• (adv.) At what price; how dear.

Example Sentences:

Yow

Definition:

• (pron.) You.

Example Sentences:

• (1) Pronounced "oll-yow", Olhão is the Algarve's largest fishing port.