(idiomatic, US) To take a customary action to ward off some misfortune that is believed to be attracted by a presumptuous statement.

(idiomatic, US) Hopefully; a self-directive to undertake the customary action to ward off bad luck.

(idiomatic) Honest and open. / A discreet, unassuming reference to freemasonry.

(idiomatic) A compensation for capturing or killing a person, especially someone guilty of a crime.

(idiomatic) To calm, appease or quieten a person or situation.

(idiomatic) To initiate contact or a relationship; to gain access, especially to an entry-level job.

One is cautious if one has been hurt in the past.

(property law) An encumbrance or claim on a title (ownership) to real property sufficient to interfere with title transfer until the problem has been resolved.

(idiomatic, colloquial) To merely touch.

(UK) Alternative form of on second thought