mas

• Conj

  1. but (introduces a clause that contradicts the implications of the previous clause)
  2. but (introduces the correct information for something that was denied in the previous clause)
  3. but ... really; of course; no wonder (introduces the cause of the previous clause, with the implication that the result was expected given this cause)
  4. emphasises an exclamation

• Adv
• Noun

os

• Article

  masculine plural of o

• Pron
• Noun

demonstraram

third-person plural preterite/pluperfect indicative of demonstrar

sua

• Pron

  1. Feminine singular form of possessive seu.
  2. feminine singular of seu

• Verb

ineficiência

inefficiency

ao

Contraction of a o (“to the (masculine singular)”).

longo

long

do

Contraction of de o (“of the, from the, -'s (masculine singular)”).