sicker

What it means

1. Certain.

   I'm sicker that he's not home.

2. Secure; safe.

   To walk a sicker path

   3 more examples

   But ſicker ſo it is, as the bꝛight ſtarre / Seemeth ay greater, when it is farre:

   1579, Immeritô [pseudonym; Edmund Spenser], “September. Ægloga Nona.”, in The Shepheardes Calender: […], London: […] Hugh Singleton, […], →OCLC, folio 36, recto

   And here was we made sicker than he was wi' you[…]

   1880, L.B. Walford, “Dick Netherby”, in Good Words, volume 22, Alexander Strahan and Company, page 774

   I'm as great on the side o' the law as it's siccar to be in thae uncertain times.

   1896, Samuel Rutherford Crockett, chapter XVII, in The Raiders: Being Some Passages in the Life of John Faa, Lord and Earl of Little Egypt, Macmillan and Company, page 125

In a sentence

I'm sicker that he's not home.

Where it comes from

1. Old Englishsēocra“sicker”
2. Middle Englishsiker
3. Englishsicker

Inherited from Middle English siker, sikker, sykkere, secre, seccre, from Old English sēocra (“sicker”), equivalent to sick + -er.