(transitive) To fall back on.

plural of upper class

(anatomy) The part of the respiratory tract consisting of the nose, oral cavity, pharynx and larynx.

(anatomy) The part of respiratory tract consisting of nose, oral cavity, pharynx. / (anatomy) The part of respiratory tract consisting of nose, oral cavity, pharynx and epiglottis.

plural of upper arm

to experience; to suffer. / to occur at some particular point in time. / to set upon; to attack suddenly

(automotive, cycling) A shift to a higher gear / A shift to a higher level, such as of frequency, growth, economic level, etc.

(automotive, cycling) To shift to a higher gear / (transitive) To shift to a higher level, such as of frequency, growth rate, economic level, etc.

To attack someone. / To begin an activity; to embark upon a course of action.

(humorous) One who does the washing up.