“To raise” and “to pass” have a distance of three - two substitutions and one insertion. 
My brain also has some distance from understanding this
The “close enough” detector works by measuring the Levenshtein Distance between your answer and any of the correct answers, and gives you a “close enough” if it’s less than or equal to three (though that forgiveness is reduced for shorter answers, down to zero if the correct answer has three or fewer letters). In this instance, that distance is three:
0 - PASS
(change the P to an R)
1 - RASS
(insert an I)
2 - RAISS
(change the final S to an E)
3 - RAISE
Uh…you are a wanikani church priest in disguise, right ? 
Thanks for the info 
“To Raise” is now blocked for this one!