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to slacken off

to slacken off

3.9
To become less strong or active
  • phrasal verb
  • /ˈslækən ɔf/
translation icon : aflojar
  • Net movement: zero—but if either campaign had slackened off, the other would have steamrollered to victory.

Examples

  • So I presume I need to slacken off that spring a bit.

  • The rain has finally slackened off, allowing us to go outside without getting soaked.

  • But after the eggs hatched, males whose nests had received alien eggs in bulk slackened off on nest defense.

    Academic text (2005)
  • By this time—it must be four, four-thirty—the rain has slackened off a bit, and the wind, which always seems to be peaking at Force 10 lately, seems a bit quieter too.

    Fiction book (2001)
  • It did not matter that Bearden, by slacking off, whether consciously or because she was dissipating her energy, was surely destroying her own chances for a career in the field, while Wheeler's conscientiousness would surely pay handsome dividends in both a scientific and a professional sense.

    Fiction book (2000)
  • As the race went on, the runners began to slacken off their pace in the final laps.

  • You should slacken off on your study sessions to avoid burnout before the exam.

Synonyms

to slow down
vsto slacken off
687 1.4

To move or act more slowly

is broader, covering reduction in effort or force not only physical speed
to ease up
vsto slacken off
57 3.7

To make something less strong or strict

is about lowering speed or effort rather than easing rules
to fall off
vsto slacken off
49 2.6

Become less in number, amount, or quality

is more about reducing active force or effort than general decline
to wane
vsto slacken off
48 6.4

To become less in size, amount, or strength

is about reducing active effort, speed, or force rather than gradual weakening
to drop off
vsto slacken off
21 3.5

To become less in number or amount

is about lowering speed, effort, or force rather than counts or measures
to ease off
vsto slacken off
9 4.0

To become gradually less strong or severe

is the same reduction but not necessarily described as gradual
to slack
vsto slacken off
3 5.3

To reduce effort, speed or attention

focuses specifically on reducing speed, effort, or force
to slack off
vsto slacken off
  • Informal
3 3.9

To become less strong or busy

is the same sense but phrased with a different final word
to slacken
vsto slacken off
1 4.9

Become or make slower, for example the wind

is about becoming less active rather than making something do so
to flag
vsto slacken off
1 5.1

To become weak or lose energy

involves lowering force, speed, or effort rather than simply feeling tired
to slack up
vsto slacken off
  • UK
1 5.7

Move, act, or work less quickly and with less energy

is the change that happens by itself rather than something causing it

Antonyms

1.0

To make something larger or more in number

110 4.0

Make something stronger or more intense

How Intense

to intensify
110 4.0
to pick up
165 3.0
to slacken off
3.9
to ease up
57 3.7
stop
310 1.0

Surface Forms

slacken off infinitive
slackened off past participle
slackening off present participle
slackens off third person singular

Morphology

slacken + off

The core meaning 'to become less intense or reduce effort' is directly carried by 'slacken' (to reduce intensity), and the particle 'off' here simply marks diminution or movement away rather than adding an idiomatic twist. Because the constituent meanings compose straightforwardly and follow a common verb+particle pattern, a B1 learner who knows 'slacken' and 'off' should be able to infer the MWE meaning.

Etymology

Slacken off comes from the image of a rope being let go until it becomes loose: slacken means to make something less tight and off shows it moving away. So, to slacken off now means 'to become less strong, active, or fast'.