By its stress and inflection it can describe many emotions; no other word can be used with so many grammatical nuances.
It can be used as a noun
(I don't give a fuck).
It can be used an adjective
(It's a fucking beauty).
It can be used as a verb in its transitive form
(The game was fucked by the weather).
It can be used as a verb in its intransitive form
(He well and truly fucked up).
It can be used in the present tense
(I am fucked).
It can be used in the past tense
(I was fucked).
It can be used in the future tense
(Well, I'll be fucked).
The word has been used by some very notable people throughout history, the most well known being
What the fuck was that? - The Mayor of Hiroshima
Look at all those fucking Indians! - General Custer
Where the fuck is all that water coming from? - Captain of the Titanic
That's not a real fucking gun - John Lennon
Who's going to fucking know? - Richard Nixon
Heads are going to fucking roll! - Anne Boleyn
The fucking throttle's stuck! - Donald Campbell
I thought I could smell fucking petrol! - Nikki Lauda
What fucking map? - Mark Thatcher
Any fucker can understand that! - Einstein
It does fucking look like her! - Picasso
What the fuck do you mean, I'm forever blowing bubbles? - Michael Jackson
How the fuck do you work that out? - Pythagoras
You want what on the fucking ceiling? - Michaelangelo
Fuck-a-duck! - Walt Disney
Why? Because it's fucking there, that's why! - Sir Edmund Hilary
I didn't want to fucking go anyway! - Sebastian Coe
I don't suppose it's fucking raining? - Joan of Arc
Scattered showers, my fucking arse! - Noah