firmˈless adjective (obsolete)

Wavering

firmˈly adverb

firmˈness noun

firmˈware noun (comput sl)

Software or similar instructions forming a more or less permanent and unerasable part of a computer's memory

firm down

To make (ground, etc) firm or firmer

firm up

1. (of prices, etc) to firm (commerce)
2. To make (a promise, etc) firm or firmer