He recently cancelled a fishing trip to Canada and doubled back on the question of how to make a living from the farm.
In August, Apple doubled down, launching another massive lawsuit targeting 17 Samsung phones and tablets.
Instead, Murdoch doubled down by launching a new Sunday edition of his beloved paper.
Prozac and Zoloft are close behind—research now shows that their usage among preschoolers has more than doubled in recent years.
By picking Paul Ryan as his running mate, Mitt Romney has doubled down on a public-relations strategy of phony deficit reduction.
During the year the membership of the association more than doubled.
If the attractive force is doubled, then the repulsive force is doubled.
The final consonant in track is not doubled because track ends with two consonants.
We doubled steel production this year, will do the same next.
Only who can tell how a ghost, with his doubled experience, may think of this thing or that?
late 13c., "make double," from Old French dobler, from Latin duplare, from duplus (see double (adj.)). Meaning "to work as, in addition to one's regular job" is c.1920, circus slang, from performers who also played in the band. Related: Doubled; doubling. To double up bodily is from 1814.
A blow on the stomach "doubles up" the boxer, and occasions that gasping and crowing which sufficiently indicate the cause of the injury .... [Donald Walker, "Defensive Exercises," 1840]
mid-14c., "amount twice as great," also "duplicate copy," from double (adj.).