When it comes to the term "more tortoiselike", there are a few antonyms that come to mind. The first one is "rabbit-like", which suggests speed, agility, and quickness. The second one is "monkey-like", which implies playfulness, mischief, and curiosity. The third one is "bird-like", which indicates gracefulness, lightness, and freedom. While being tortoiselike may connote certain virtues like patience, resilience, and steadiness, it is worth noting that different animals possess different strengths and weaknesses that may come in handy in different situations. Ultimately, the choice of antonym depends on the context and the message that one wishes to convey.