RECKLESS = rash; careless.
Don’t be a reckless driver! 🌲💥 🚗
FECKLESS = incompetent; ineffective.
The boss fired the feckless worker.

Generally, SHALL = WILL.

But when you ask questions, use SHALL only with “I” and “we”:
Shall YOU marry me? 💍 → ❌
Shall WE dance? 💃 → ✔️

EXCEPTIONABLE = offensive:
I was criticized for my EXCEPTIONABLE comments. 👩💬 😡

EXCEPTIONAL = outstanding:
My essay 📝 is EXCEPTIONAL. 👍