it is derived from the root word 'loqua'... which refers to SPEECH or TALK
Remember Loqua with mokka.
loquacious : loq(speech,talk)+voracious.
pickup 'lok' from this word which means people. Now think of Indian Lok Sabha where there are many loquacious politicians.
talks like a LOCOMOTIVE
In lokshabha people speak trivial things
loq(log)+acious(anxious)..log that is people are anxiously waiting for talking about some one