Irregular Spanish verbs - 'u' changes to 'ü'
the 'u' changes to 'ü' if the conjugation gives the stem an 'a', an 'e', or an 'o'
aguar - to water down
amortiguar - to muffle, soften, cushion
apaciguar - to calm down, to soothe (got to love that valium)
atestiguar - to testify to
averiguar - to find out
fraguar - to forge
menguar - to decrease, to diminish
agorar - was not listed in the dictionary
errar - to choose wrong
desosar - was not listed in the dictionary
oler - to smell
poseer - to own, to possess
proveer - to supply, to provide