ablaut

As nouns the difference between ablaut and umlaut

is that ablaut is ablaut while umlaut is umlaut.

In linguistics terms the difference between ablaut and anlaut

is that ablaut is the substitution of one root vowel for another, thus indicating a corresponding modification of use or meaning; vowel permutation; as, {{term|get|lang=en}}, {{term|gat|lang=en}}, and {{term|got|lang=en}}; {{term|sing|lang=en}} and {{term|song|lang=en}}; {{term|hang|lang=en}} and {{term|hung|lang=en}}, distinct from the phonetic influence of a succeeding vowel while anlaut is the first sound of a word (word-initial position) or syllable (syllable-initial position).

As a verb ablaut

is to undergo a change of vowel.

In linguistics terms the difference between ablaut and acrostatic

is that ablaut is the substitution of one root vowel for another, thus indicating a corresponding modification of use or meaning; vowel permutation; as, {{term|get|lang=en}}, {{term|gat|lang=en}}, and {{term|got|lang=en}}; {{term|sing|lang=en}} and {{term|song|lang=en}}; {{term|hang|lang=en}} and {{term|hung|lang=en}}, distinct from the phonetic influence of a succeeding vowel while acrostatic is in Proto-Indo-European athematic nominals, having a specific pattern of ablaut in which the accent is placed on the root syllable in all cases.

As a noun ablaut

is the substitution of one root vowel for another, thus indicating a corresponding modification of use or meaning; vowel permutation; as, {{term|get|lang=en}}, {{term|gat|lang=en}}, and {{term|got|lang=en}}; {{term|sing|lang=en}} and {{term|song|lang=en}}; {{term|hang|lang=en}} and {{term|hung|lang=en}}, distinct from the phonetic influence of a succeeding vowel.

As a verb ablaut

is to undergo a change of vowel.

As an adjective acrostatic is

in Proto-Indo-European athematic nominals, having a specific pattern of ablaut in which the accent is placed on the root syllable in all cases.