【正确答案】：
LACONIC IS DERIVED FROM LACONS, A TRIBE OF PEOPLE WHO WERE KNOWN FOR THEIR “BREVITY OF SPEECH" AND FOR THEIR HABIT OF NEVER USING MORE WORDS THAN NECESSARY. SO LACONIC MEANS "BRIEF OR SHORT", WHICH IS ETYMOLOGICALLY MOTIVATED. "A LACONIC ANSWER" IS A SHORT ANSWER.  
【题目解析】：简洁的语源于拉康族，拉康族是一个以“简洁的语言”和从不使用过多的词汇而闻名的部落。因此，简洁的意思是“简短或简短”，这是词源上的动机。简明扼要的回答是一个简短的回答。