heavy vs slack

heavy

adj
  • Hot and humid. 

  • Having high viscosity. 

  • Laden to a great extent. 

  • Serious, somber. 

  • Laden with that which is weighty; encumbered; burdened; bowed down, either with an actual burden, or with grief, pain, disappointment, etc. 

  • Not easy to bear; burdensome; oppressive. 

  • Of a market: in which the price of shares is declining. 

  • Containing one or more isotopes that are heavier than the normal one. 

  • especially, having a maximum takeoff weight exceeding 300,000 tons, as almost all widebodies do, generating high wake turbulence. 

  • Doing the specified activity more intensely than most other people. 

  • High, great. 

  • Armed. 

  • Heavily-armed. 

  • Having great weight. 

  • Not raised or leavened. 

  • Having the heaves. 

  • Having much body or strength. 

  • High in fat or protein; difficult to digest. 

  • Loud, distorted, or intense. 

  • Slow; sluggish; inactive; or lifeless, dull, inanimate, stupid. 

  • Of great force, power, or intensity; deep or intense. 

  • With eyelids difficult to keep open due to tiredness. 

  • Impeding motion; cloggy; clayey. 

  • Having a relatively high takeoff weight and payload, 

adv
  • very 

  • To a great degree; greatly. 

  • In a heavy manner; weightily; heavily; gravely. 

verb
  • To make heavier. 

  • To use power or wealth to exert influence on, e.g., governments or corporations; to pressure. 

  • To sadden. 

noun
  • A newspaper of the quality press. 

  • A villain or bad guy; the one responsible for evil or aggressive acts. 

  • A relatively large multi-engined aircraft. 

  • A doorman, bouncer or bodyguard. 

slack

adj
  • Moderately warm. 

  • Vulgar; sexually explicit, especially in dancehall music. 

  • Not active or busy, successful, or violent. 

  • Excess; surplus to requirements. 

  • Lax; not tense; not firmly extended. 

  • Lacking diligence or care; not earnest or eager. 

  • Lax. 

  • Moderate in speed. 

  • Weak; not holding fast. 

adv
  • Slackly. 

verb
  • To slacken. 

  • To lose cohesion or solidity by a chemical combination with water; to slake. 

noun
  • Unconditional listening attention given by client to patient. 

  • A temporary speed restriction where track maintenance or engineering work is being carried out at a particular place. 

  • A tidal marsh or shallow that periodically fills and drains. 

  • The part of anything that hangs loose, having no strain upon it. 

  • Small coal; coal dust. 

  • A valley, or small, shallow dell. 

How often have the words heavy and slack occurred in a corpus of books? (source: Google Ngram Viewer )