• Basic forms
• 捨てる — throw away; abandon / base form
• 捨てます — throw away / masu form
• 捨てた — threw away / ta form
• 捨てて — throwing away … / te form
• 捨てない — do not throw away / negative
• 捨てれば — if (one) throws away / conditional
• 捨てろ — throw it away! / imperative
• Common expressions
• ゴミを捨てる — throw away trash
• 諦めて捨てる — give up and abandon it
• 身を捨てる — risk one’s life; sacrifice oneself
• More
• 捨てられる — can throw away; be thrown away / potential / passive
• 捨てたい — want to throw away / 〜たい form

捨てる（すてる） is an ichidan verb meaning “throw away” or “abandon.” It’s used both for physical things (trash) and abstract things (habits, ideas, attachment).