The word “liberty” itself is fairly vague, the meaning of which is, of course, difficult to define in a legal sense. Liberty has been interpreted before essentially to mean liberty in the aggregate. To begin with, let’s look at what liberty means. It means freedom, and is an essential right that a person has. The word most commonly is used to mean being able to exercise a freedom, to take an action, or even think a certain way - without being prevented from doing so, and without being forced to do so.
FWIW, I take “liberty” as a freedom of movement thing. Am I free to go, or must I go where I am told to go (e.g., jail cell, military campaign).
“Inalienable” is the opposite of the ability to take something you have and alienate it to another person. Not that the thing or attribute can’t be taken from you, just that it can’t go from you to another. Can the government take your life? You bet. Capital punishment. Your liberty? Yes. Jail for you, or the draft.
Liberals and living constitutionalists will take any word, anywhere, and pervert its meaning in order to get the outcome they want. This affliction infests the legal profession and courts especially. Sloppy, dangerous to personal independence and freedom.