behartenswaardig

Etymology
A shortening of based on other words of the form [gerund] + -s- + -waardig that lack -ig- before the infinitive ending. Equivalent to.

Adjective

 * 1) worth (i.e., deserving of) taking to heart

Usage notes

 * Occasionally proscribed based on the misguided notion that the verb were non-existent; this verb has in fact existed since the sixteenth century.