Definify.com

Webster 1913 Edition

Verb.

[Cf. AS.

sceolh

squinting, Icel.

skjāgr

wry, oblique, Dan.

skele

to squint.]

To walk sidewise.

[Obs.]

L’Estrange.

Verb.

To walk sidewise. [Low and not in use.]

[This word is probably the G. schielen, Dan. skieler, to squint.]

shail ‎(third-person singular simple present shails, present participle shailing, simple past and past participle shailed)

(obsolete, intransitive) To walk sideways.
(Can we find and add a quotation of L'Estrange to this entry?)

shail

Irish mutation
Radical	Lenition	Eclipsis
sail	shail after an, tsail	unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.