Complaining in a rather petulant or whining manner: Inclined to make whining or peevish complaints.
It is the manner in which the complaint is being made that is the deciding factor as to whether someone is merely complaining or querulous with the latter being marked by a high pitched whining tone.
“His urbanely crinkly face oozes disapproval; his querulous voice is like a fingernail at a scab.”
“The querulous critic who scolds it as he would a spoiled child, has not learned the primer of politics..”
The last stage of life; old age.
Senectitude comes from the Medieval Latin noun senectitūdō meaning “old age,” which in turn comes from Classical Latin senectūs, a derivative of the noun senex meaning “old man.” Senectitude entered English in the late 1700s, more precisely, in 1796 in Jonathan Swift’s Gulliver’s Travels