plunge
     n 1: a brief swim in water [syn: {dip}]
     2: a steep and rapid fall
     v 1: thrust or throw into; "Immerse yourself in hot water" [syn:
          {immerse}]
     2: drop steeply; "the stock market plunged" [syn: {dive}, {plunk}]
     3: dash violently or with great speed or impetuosity; "She
        plunged at it eagerly"
     4: begin with vigor; "He launched into a long diatribe"; "She
        plunged into a dangerous adventure" [syn: {launch}]
     5: cause to be immersed; "The professor plunged his students
        into the study of the Italian text" [syn: {immerse}]
     6: fall abruptly; "It plunged to the bottom of the well" [syn:
        {dump}]
     7: immerse briefly into a liquid so as to wet, coat, or
        saturate; "dip the garment into the cleaning solution";
        "dip the brush into the paint" [syn: {dunk}, {dip}, {souse},
         {douse}]
     8: engross (oneself) fully; "He immersed himself into his
        studies" [syn: {steep}, {immerse}, {engulf}, {engross}, {absorb},
         {soak up}]
Source: WordNet® 2.0