If you had to give up one word that you use regularly, what would it be?

The word hello cam be used regularly while talking at phone and unknown person. Hello is a very common word, which can be used by most individuals while taking at phone Most people have mobile and calll and use first word hello before talking with any individual.  Thus, most people use hello word regularly while taking at phone and any individual.

I also use hello word regularly while talking with my friends, cousins, family members, and clients. Thus, hello word can be used regularly while talking at phone with any individual.