Children has passed through the same history, though the
intermediate form _childer_ lasted till the seventeenth century in
literary English, and is still found in dialects; as,--

"God bless me! so then, after all, you'll have a chance to see
your _childer_ get up like, and get settled."--QUOTED BY DE
QUINCEY.

Kine is another double plural, but has now no singular.

In spite of wandering _kine_ and other adverse
circumstance.--THOREAU.


II. Plurals formed by Vowel Change.


40. Examples of this inflection are,--

man--men
foot--feet
goose--geese
louse--lice
mouse--mice
tooth--teeth

Some other words--as _book_, _turf_, _wight_, _borough_--formerly had
the same inflection, but they now add the ending _-s_.