tracking, tracing; trawling
“Varios de ellos han acabado siendo localizados e identificados después de largos rastreos por hospitales a raíz de alertas lanzadas por familiares que no tienen noticias de alguien desde el pasado viernes por la noche.” — Several of them were found and identified after a long search through the hospitals due to alarms raised by family members who hadn't had heard from them since the previous Friday night.
Etymology tree Latin rādō Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Italic *-trom Latin -trum Latin rāstrum Spanish rastro Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō)bor. Latin -izō Latin -izāre Spanish -ear Spanish rastreardeverb. Spanish rastreo Deverbal from rastrear.