also: いくさき
noun
The place one is heading to; used for physical destinations in travel or movement.
旅行の行く先はまだ決めていない。
I haven't decided on the destination for my trip yet.
noun
Refers to the location or whereabouts of a person, often used when the location is unknown or being inquired about.
彼の行く先が分からなくなった。
I lost track of his whereabouts.
noun
Metaphorical extension: what lies ahead in life, career, or a situation; often used in expressions like 行く先が不安だ.
就職活動で行く先が見えず、不安だ。
I can't see my future prospects in job hunting, and I'm anxious.