(idiomatic) To change one's plan or approach when an effort is already underway or at another inopportune time.

(nautical) A deeper channel cut into the sea or river bed, to enable larger ships to pass through to a port.

Achieved without taking chances. / Without random chance. / Having no chance or opportunity. / (cricket, not comparable) Without a chance of being dismissed.

To change or exchange repeatedly. / To rearrange, reconfigure, or customise.

The official title held by the British cabinet minister, who is responsible for all governmental economic and financial matters, including the treasury.

(education) An official holding a rank immediately below that of chancellor. / A lower judge of chancery.

To exchange positions (with another)

Turbulent changes do not affect reality on a deeper level other than to cement the status quo. / A change of heart must accompany experience before lasting change occurs.

One who does not change, or opposes a change. / (grammar) A word that does not change its form (for a noun, from singular to plural; for a verb, according to person; etc.).

(UK, New Zealand) A place where foreign currency can be exchanged.