非死不可

• 非(wrong; opposite; deny)ASSOCIATIVE

Two bird wings spread in opposite directions symbolize opposition and negation.

• 歹(bone; death)RADICAL
• 匕(body; corpse)ASSOCIATIVE

Broken bones and a person collapsed together form the image of death.

• 不(no; not; negation)ASSOCIATIVE

A bird flying swiftly upward and never willing to return represents the meaning of swift and unyielding.

• 口(mouth; opening)RADICAL
• 丁(man; adult male)PHONETIC

A mouth uttering words of approval with a sound like "ding" gives you the character meaning "can" or "able."