One of those words which has a hint of magic for me. It seems longer than it is, you can rhyme it with succulent (note the double c), and it has the mystery of its meaning not being easy to guess unless you already know it or have looked it up.
For the record, it means hostile, belligerent, aggressive or savage and it is derived from Latin. I have always summed it up as ‘keen for a fight’.
His grandfather was a truculent sort, always disagreeing with the rest and ready to argue hard to impose his view.
Lotte has a very truculent attitude towards her staff. She doesn’t trust them, criticizes them openly and will treat them harshly if they disobey her.
Sometimes it can mean fierce. Truculence is the noun form. Not a word to use every day but fun to drop into conversation and see what reactions you get.