This is the 15993rd most frequent Russian word.
прямой
Direct; straight.
Here, 'прямой' is used to describe a trait related to directness and honesty, conveying a metaphorical extension of the word's meaning ('straight').
У него прямой характер.
He has a straightforward character.
In this sentence, 'прямой' describes a literal straight line, showcasing its primary physical meaning.
На карту нанесли прямую линию.
A straight line was marked on the map.
Here, 'прямой' is used to indicate a direct route or course, applying a spatial concept to travel.