trek -
make a long and difficult journey; "They trekked towards the North Pole with sleds and skis"
journey,
travel change location; move, travel, or proceed, also metaphorically; "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast"
trek -
journey on foot, especially in the mountains; "We spent the summer trekking in the foothills of the Himalayas"
journey,
travel change location; move, travel, or proceed, also metaphorically; "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast"
