Is it necessary ( nec es sary), n., for you to make that merciless (mer ci less), adj., noise while you watch the game?
Sometimes root words transcend to different spellings and different punctuations, when they change to different parts of speech. Know how they change.
Necessity, (ne ces si ty), n.; Necessarily (nec es sar i ly) adv.,; Necessitate (ne ces si tate), v.
Say What You Mean. Mean What You Say, and know which version of a word works best for your intended use.