It's a joint of tubes. You start by teaching angles an acute angle, a right angle, an obtuse angle, a straight angle.

Dull Knife!

You, Dull Knife.

The point of the pencil has become dull.

Hell, what would we do there?

It's getting blunter and blunter.

I have a dull pain in my temples and my mind feels like its covered with a thin layer of fog.

Now, Aunt Moll was kind of muddleminded.

Forget it. Drinking dulls your senses.

Rouse yourself from this pastoral torpor.

3.3, quoting the Tajikistan Daily Digest, Eurasianet, 4 June 2004.

Suppose that a lesser human being...

Dull Knife, the old chief is much too sick.

The lack of interest in the problem on the part of society.

Yes. My blade must be getting dull.

Hit over the head with a blunt instrument.

Spanish Woman, speak to Dull Knife.

Think of the children on the slow side of the class.

Spacecraft and rocket upper stage passivation

You're not so usually slow on the uptake, Evans.

Just sweet and vague and terribly slow.

I'm a little slow till after my first drink.

I ended up with blunt chest trauma.

(c) Passivation at end of mission

I'm more the plodding sort.

He was allegedly beaten with blunt objects and wounded with a knife.

(b) properly passivated or neutralized by chemical reaction or

Now, in my opinion, this boy was hit on the head with a blunt instrument.

It all mother's fault, you know.

You sleep too much, that's what makes you such a knowall.

1969 Certificate Postgraduate Course on Mental Retardation, Letchworth Village, United States

Some passivation measures may introduce new failure modes.

(c) Universal passivation at end of mission

I know I'm kind of slow sometimes, but I see things.

Oh, of all the stupid, tactless people I've ever...

Dull Knife, you know the soldiers will have to follow us.

Passivation of spacecraft and upper stages after their mission

7. Spacecraft and launcher passivation at end of life

But for the umpire's blunder, he'd probably still be batting.

That there's such a thing as dullness of heart, acceptance, and letting go.

A medical certificate was said to indicate the existence of injuries caused by a blunt object.

You behaved with a stolid, obtuse lack of comprehension which frankly shocked me.

Death was instantaneous, caused by one blow from a heavy and blunt instrument.

And fat and lazy and dull and stupid like some cow on a milking machine.

My sword may be blunt, but that's more than enough for someone like you.