impeccable 

to be perfect,faultless

that sexy ass girl is impeccable and knows how to work it

impeccable by narcissistic April 23, 2006

impastable 

pasta that is difficult to eat.

Eating spaghetti in a restaurant on a blind date is impastable.

impastable by Supercraptastic February 23, 2011

impecuable 

Impeccable but for playing a sport, usually basketball. The act of having clean precision during ones actions of defending, attacking, passing et cetera.

Clapperson's defending was impecuable.

impecuable by ignPax October 3, 2021

immacuable 

Amazing, beyond the ordinary, completly awesome

The students in my class all wrote immacuable essays

immacuable by Kim although the word was created by Arsenty September 18, 2008

implacable 

Unable to pacify.
Unable to appease.
Unrelenting.

My enemy is implacable

implacable by Robin December 5, 2004

Impalpable 

Something you can't touch.

"Can't touch this."

or

"This object is impalpable."

Impalpable by Ketrinon November 20, 2009

impeckable

1. So perfect and flawless that a bird wouldn't dare chip at it with its beak.
2. Too hard/resilient to be bored into by said proboscis-hammering.

Flickers sometimes make a loud hammering noise on sheet-metal in an attempt to drive other birds away, even though they are obviously aware that metal --- unlike wood --- is impeckable.

impeckable by QuacksO December 24, 2019