difícil

1. difficult, hard, tough, challenging, rough, tricky, trying, arduous, testing
2. unlikely (i.e. improbable)
3. awkward (e.g. situation or position)
4. rocky, bumpy (e.g. start, road)

comprobar

1. to check, to check on, to check out, to see, to check to see (examine)
2. to verify, to ascertain, to determine, to confirm
3. to test (the accuracy or effectiveness of something)
4. to prove, to establish (i.e. demonstrate the veracity of something)
5. to note (as in realizing)
6. to be checked, tested, to check out
7. to be found, determined

estos

• Det

  masculine plural of este

• Pron

datos

1. plural of dato
2. data

no

• Adv

  1. no
  2. not

• Intj
• Noun
• Noun

se

• Pron

  1. third person (also used for usted and ustedes) reflexive direct or indirect object oneself, himself, herself, itself, yourself; each other; one another
  2. used to convey the meaning of the English passive voice in the third person and with usted and ustedes

• Verb

han

third-person plural present indicative of haber

excavaciones

plural of excavación