promising

Etymology

adj

1. Showing promise, and likely to develop in a desirable fashion.
   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
   a promising young apprentice
2. Encouraging and inspiring confidence.

verb

1. present participle and gerund of promise

noun

1. The act of making a promise.
   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