# Six-letter word with four unique vowels

Can you find the English word that meets all of the following criteria?

• six letters long (non-hyphenated)
• four unique vowels
• two unique consonants
• starts and ends in a vowel
• when you remove the vowels, you see through them
• What do you mean by see through them? Nov 26 '17 at 19:49
• If the remaining consonants were "mt" (=empty) you could see through it. I don't think this is right, because OP says "them", but maybe something like that? Nov 26 '17 at 22:49
• I wonder why this riddle is highly downvoted. Nov 27 '17 at 8:53
• @JamalSenjaya That's because it sucked at first :) Nov 27 '17 at 18:00

Based on the word list in Laurel's answer, my answer is:

opaque.

Because, when you remove the vowels, you have:

pq, which resembles a pair of glasses, thus meeting the see through criteria.

• Yep. There's also a link with the word and what you're left with, if you wanted to mention that. Nov 27 '17 at 7:07

Not sure about seeing through them, but removing vowels from

OUTVIE

... leaves you something you can look at ...

• through is important Nov 26 '17 at 21:17
• Is that... Even a word? Nevermind, this IS English we're talking about. I'd love it if you included a definition, though. Nov 28 '17 at 2:28

Well, now that there is no , I hacked together some code. I used /usr/share/dict/words as my dictionary. We know that it starts and ends with a vowel, is six letters long, and all the letters are different, so the word must match this regex:

^([aeiou])(?!\1)(.)(?!\1)(?!\2)(.)(?!\1)(?!\2)(?!\3)(.)(?!\1)(?!\2)(?!\3)(?!\4)(.)(?!\1)(?!\2)(?!\3)(?!\4)(?!\5)[aeiou]\$

We know it must have 4 vowels, which means it will also match this regex:

([aeiou].*?[aeiou].*?[aeiou].*?[aeiou])

This got me this list:

acoine
aerugo
agouti
ailuro
alpieu
apiole
apiose
apoise
aquose
areito
arigue
ariose
arouse
asideu
audile
augite
aumrie
auntie
auride
aurite
embuia
epizoa
iodate
ipomea
obelia
ogaire
opaque
opiate
oturia
outage
outawe
outlie
outsea
outvie
uniate
ureido
uremia
utopia

The last clue ("when you remove the vowels, you see through them") isn't as easily cracked. I have some guesses:

outsea -> "sea" is through when you remove the vowels
uremia -> remove vowels to get rm
utopia -> remove vowels to get "tp" or toilet paper. The promise of utopia is replaced by something you flush away

• Nice regex. You don't have the correct answer though Nov 26 '17 at 21:18

Surely there are many such words? But one example is

GUINEA.

• Its been updated Nov 26 '17 at 19:18