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yak1, yack, yaik noun
1 the eye: Whin she wis seventeen she wis sae bonniie that man’s yak wid follow her. 19-.
2 the face 19-20.
‣ yaik verb to look 20-. etymology: Romany; from Sanskrit akshi; also attested by Galloway Tinkler-Gypsies and Kirk Yetholm Gypsies; sense 1 also collected by Simson (1865) and attested by three of his informants; form yak attested in Shelta and by SR and JS note:

Grellmann (1787) collected the forms Aok, Jaok, Jaka with the same meaning from Continental gipsies. Smart & Crofton (1875) collected the form yok ‘the eye’ from English Gypsies.
yak2 noun fire la18-19. etymology: possibly a development from Romany yag with the same meaning or a development of yak1; which is, in turn, perhaps a development of Sanskrit agnish ‘fire’’ also collected by Simson (1865) and attested by three of his informants; collected by Rev John Baird from Kirk Yetholm Gypsies note:

Grellmann (1787) collected yak with the same meaning from Continental gipsies.

A form yag cited by Canadian Paul Pope (2013) meaning both ‘fire and coal’.
yog, yag, yak noun
1 coal la19-.
2 fire 20.
3 firewood 20. Compare yagger, cadyuch etymology: sense 1 perhaps a development from Romany yog, yak ‘fire’; perhaps also Cant; yak form also collected by EMcC/PS and attested by Galloway and Perthshire and Argyleshire Tinkler-Gypsies; form yak collected by Simson (1865); forms yag and yog collected by Joseph F G S Lucas from Kirk Yetholm Gypsies, BS in TDITA and SS; form yog collected by RD note:

An older Romany word for coal is wonger or wongar ‘coal’ the word developed into another word for money, according to the Oxford English Dictionary because ‘The shift in meaning in British Romani may be due to a Romani practice of collecting coal fallen from passing trains for use as currency...’. Grellmann (1787) also collected the terms jangar, and angar with the same meaning from Continental gipsies perhaps wonga is a development from these much earlier words. However, cole is another Cant word for money and the OED’s first attestation is from 1673.

Smart & Crofton collected the form Yog ‘fire’ and also ángar, vóngar, wóngar ‘coal, coals’ from English Gypsies.