Slack - braduno - Slow, delay, hesitate
Longsuffering - makrothumeo - To be even-tempered while enduring trying circumstances; patiently endure
Willing - boulomai - To desire or wish to experience something with the implication of some reasoned planning or will to accomplish the goal.
Purpose, plan or intention
Any - tis - One or some or every or all without specification
Should perish - apollumi - Destroyed, without spiritual life
All - pas - All, any, every, each, the whole
Repentance - metanoia - Change or reversal of mind, heart, direction, purpose