tog

Concise Oxford English Dictionary © 2008 Oxford University Press:
tog1 informal

▶noun (togs) clothes.

■ Austral./NZ & Irish a swimming costume.

▶verb (be/get togged up/out) be or get dressed for an occasion or activity.

– derivatives
toggery noun.

– origin C18: appar. an abbrev. of obs. criminals' sl. togeman(s) ‘a light cloak’, from Fr. toge or L. toga (see toga).

Concise Oxford English Dictionary © 2008 Oxford University Press:
tog2

▶noun Brit. a unit of thermal resistance used to express the insulating properties of clothes and quilts.

– origin 1940s: from tog1, on the pattern of an earlier unit called the clo (first element of clothes).