sans doute

no doubt, most probably, most likely

avait

third-person singular imperfect indicative of avoir

et

and

il

1. he (third-person singular masculine subject pronoun for human subject)
2. it (third-person singular subject pronoun for grammatically masculine objects)
3. Impersonal subject; it

lorsque

when (at a time when)

le

• Article

  1. the (definite article)
  2. Used before abstract nouns; not translated in English.
  3. Used before the names of most countries, many subnational regions, and other geographical names including names of lakes and streets; not translated into English in most cases.
  4. the; my, your, etc.
  5. a, an, per
  6. on

• Pron

bruit

1. a noise
2. a rumor or report

doute

• Noun

  doubt

• Verb