contagiosa

In a sentence

• La seva rialla és contagiosa.

  Her laughter is contagious.

  Here, 'contagiosa' is used metaphorically to describe mental or emotional effects being spread.

• La grip que va agafar era molt contagiosa.

  The flu she caught was very contagious.

  Here, 'contagiosa' is used literally to describe the flu as a disease that can spread from one person to another.

• Vaig veure una energia contagiosa en el seu discurs.

  I saw a contagious energy in her speech.

  Here, 'contagiosa' is again used metaphorically to describe an atmosphere or mood that affects others.