Are you seeing the problem, yet?
Those acts are different from military occupation or apartheid or genocide. It's not a judgement of value. It's a description of a method.
My point is that the word "terrorism" transcended the description of a technique for reaching certain goals, to a general blanket term used to describe "pure evil" and so people started to use it to describe very bad things even if they are not technically terrorism
They don't plow through a crowd with a truck or plant a bomb in an everyday place because they don't need to do that to instill terror, those are tactics of the weak. No, they disappear the people around you, with the same aim, and from a position of power. Which is the greater terror? A truck that detonated downtown or knowing a relative that got killed, locked up, or tortured? Apartheid and genocide are worse terrors than that, and by a stronger oppressor.
Many Palestinians in the West Bank have to pass through military checkpoints daily just to go about their daily lives, and at every point, one wonders if it is on that day that their life goes sideways.
We have "repression","oppression", "persecution", "subjugation".
Why do we need to use the word "terrorism" there? I suspect it has to do with the fact the word "terrorism" has been abused by american right wing after 9/11 to just describe "any muslim" and "any evil" and there has been appetite ever since to have some retribution and use this term back to label the west (and israel as its proxy).
Again, I'm not trying to defend the actions of israel against the palestinian population of the west bank in particular, but I find that "repression","oppression", "persecution", "subjugation" are already strong words enough and we don't need to strip the word "terrorism" from its specific meaning.
The definition that most people have in mind is probably what just mentioned earlier: how similar is it to the examples of irregulars "setting bombs in public infrastructure", "suicide trucks", and "suicide bombers".
But as the dictionary definition betrays, the ambiguity due to etymology exists, and is frequently exploited as a rhetorical technique by people using the word.