terse
sparing in the use of words
articulate
having or showing the ability to speak
tenet
a principle or belief, especially one of the main principles of a religion or philosophy
irrelevant
not connected with or relevant to something
amiably
in a friendly and pleasant manner
stealthy
behaving, done, or made in a cautious and manner, so as not to be seen or heard
indigenous
native, originating from or belonging to
acrimonious
angry/bitter
conceded
admit that something is true or valid after first denying or resisting it, surrender
elucidate
make something clear, explain