This is the 14th most frequent Slovak word.
ale
"But"
In this sentence, 'ale' is used to juxtapose two characteristics that might seem contradictory (youth and wisdom).
Je síce mladý, ale veľmi múdry.
He is indeed young, but very wise.
Here, 'ale' introduces a contrast between the desired action (going on a trip) and the unexpected circumstance (rain starting).
Chcel som ísť na výlet, ale začalo pršať.
I wanted to go on a trip, but it started to rain.
The word 'ale' here indicates a change of intention or outcome from the original plan.