Showing promise, and likely to develop in a desirable fashion.
a promising young apprentice
The obtained low and anisotropic thermal conductivity, and feasibility of synthesis, in addition to other reports on high electron mobility, make arsenene a promising material for a variety of applications, including thermal management and thermoelectric devices..2015, M. Zeraati, S. M. Vaez Allaei, I. Abdolhosseini Sarsari, M. Pourfath, D. Donadio, “Highly Anistoropic Thermal Conductivity of Arsenene: An ab initio Study”, in arXiv:
So it cannot be supposed that promisings differ from other word-givings in that a word-giver makes a promise only if he or she uses the locution "I promise".1992, Judith Jarvis Thomson, The Realm of Rights, page 299: