You may recognize the partial words below, even though something is wrong with them. The same thing is wrong in each word, but what is it? What are the complete words, and can you come up with a single word, which, when broken up, explains the problem and its solution?

ETH
DETH
PTNER
CHTER
IMPTIAL
APTMENT

Answer:

The complete words are:

EARTH
DEARTH
PARTNER
CHARTER
IMPARTIAL
APARTMENT

The single word to explain the problem and its solution is ARTIST. 

Explanation: ART IS T 

Credit: The Enigma
NPL Magazine (adapted)
November, 2015
CRWTH