extemporising

(Thus we saw that the amoeba is in the habit of "extemporising" a stomach when it wants one.) "Other wants occasioned by circumstances will lead to other efforts, which in their turn will generate new organs."

Life and Habit Samuel Butler 1868

The difference is that, unlike Alvy, Ruppert seems to believe that there is still a good reason to get out there and talk about these things, and maybe even do something, although after almost 90 minutes of watching him extemporising, explaining, chain-smoking and occasionally weeping at the tragic state of things, it's hard to see what.

Mark Kermode's DVD round-up Mark Kermode 2010

A far more likely explanation is that they were never part of the instructions in the first place and the accused was again extemporising an answer that he thought would serve his immediate purpose, which included his oft repeated insistence that other were to blame, particularly his accounting staff, for questions that he had difficulty in answering.

ANC Daily News Briefing 2005

Spread on the jury foremast these enabled them to get the Pretty Jane before the trade wind, to creep along at a mile an hour while they set to work on extemporising aftersails that doubled her speed.

Hornblower In The West Indies Forester, C. S. 1958

Some of the party drifted in from the terrace outside as Sandy's long, boyish fingers began to move capably over the keys, extemporising delightfully.

The Moon out of Reach Margaret Pedler

At this gentle admonition the sleepy child would rise obediently, rubbing his eyes, and master and pupil descended to the sitting-room, where they would play together till the early hours of the morning -- Pfeiffer giving out a theme, and Beethoven extemporising upon it, and then

Story-Lives of Great Musicians Francis Jameson Rowbotham

"The Directory for the Public Worship of God in the three Kingdoms" was not so much a book of devotions as a set of instructions to the minister, who was allowed the discretion of using what the book provided, or extemporising a service of his own upon its principles.

Bell's Cathedrals: Southwark Cathedral Formerly the Collegiate Church of St. Saviour, Otherwise St. Mary Overie. A Short History and Description of the Fabric, with Some Account of the College and the See George Worley

He took the hint, and ended this triumphant display of skill by extemporising

Blackwood's Edinburgh Magazine, Volume 62, Number 361, November, 1845. Various

During these last years he led a very retired life, but he continued to play the organ at his oratorios, at first from memory, and later extemporising the solos in his concertos, which were always an integral feature of his concerts.

Handel Edward J. Dent 1916

But when I was presented to Lord Nevil I desired, perhaps too ardently, to please him; I displayed all my talents, dancing, singing, and extemporising before him -- I believe, though I am not certain -- that I appeared to Lord Nevil somewhat too wild; for although he treated me very kindly, yet, when he left my father he said that he thought his son too young for the marriage in question.

The World's Greatest Books — Volume 08 — Fiction Various 1910