guesswork
US /ˈɡes.wɝːk/
UK /ˈɡes.wɝːk/

1.
palpite, conjectura
the process of making a judgment or decision without having enough information to know for certain what is correct or true
:
•
The exact number of attendees is still a matter of guesswork.
O número exato de participantes ainda é uma questão de palpite.
•
Much of the early research involved a lot of guesswork.
Grande parte da pesquisa inicial envolveu muito palpite.