I'm usually not at a loss for words. Occasionally, I'll be caught off-guard. Like, if someone makes an especially nasty comment to my face, I might not have a snappy comeback right away, because I'm so shocked at the nastiness. Of course, I can usually come up with one later - a friend used to call that "delayed intelligence."
Mostly, though, I say whatever is on my mind - but with enough of an edit-chip so as not to be that nasty person. Mostly.
But even the most out-spoken and upfront person can have trouble saying some things. For me, the word that is toughest to say is, "No."
Even this isn't absolute, though. For example, I'm pretty good at telling my family no - no, I'm not available for dinner that night; no I don't want to come to that party; no, I won't be contributing to that gift. I am nice about it, but firm, and they understand. I was nervous the first time I said "no," but it got much easier after I realized they would still love me.
I'm also pretty good at saying no at work - no, I can't work late; no, I definitely can't come in early; no, I'm not going to do your job for you. At work, they need me more than I need them - and everyone knows this. Saying no is not as big a challenge as it once was.
I don't want it to sound like all I say is no. I actually say yes quite often, because I truly don't mind helping out, or putting in extra effort, or going out of my way for those I care about. I'm just saying in these cases, I could say no if I wanted.
So when can't I say no? Relationships.
I'm not saying I just roll over and let others treat me like a doormat. I certainly don't say yes to every invitation, or requests for money or favors. But I say yes more often than I might like, because I'm all about putting the feelings and needs of others before my own.
Truth be told, I don't think saying no is as difficult for me as it is to simply stick up for myself. So, I might not exactly say "no" to someone - but I don't always stick up for myself, or tell people my feelings are hurt, or just flat-out get up and walk away when I should.
It's something I am working on - a good balance of sticking up for myself, and still being a kind-hearted, compassionate, considerate friend. I wouldn't ever want to say no and compromise who I truly want to be.