These verbs behave as verbs with consonant stems, but they are originally vowel stems whose irregular conjugations are the result of vowel mutation and elision.
2.
Semantic work that used to be done by inflectional endings or vowel mutations is now mostly done by word order and the addition of auxiliary verbs and particles.
3.
Spanish " vieja " with a stress-attracting deprecative suffix "-ota " which prevents the e > ie stem-vowel mutation.
4.
*Expressions like " a ten foot pole " come from the Old English genitive plural form of " foot ", " fota " which did not have a final / s / or vowel mutation . ( See ten foot pole here at Harvard . ) In essence, the expression means a pole of ten feet.
5.
There is also the " genitive of measure " : forms such as " a five-mile journey " and " a ten-foot pole " use what is actually a remnant of the Old English genitive plural which, ending in / a /, had neither the final / s / nor underwent the " foot / feet " vowel mutation of the nominative plural.
मोबाइल