aelvthal: aesthant, from aelva “beauty” + thal “functional niche”.
arídamaen: dusk; from arídan “sun” + maen “fall”
arídaqerach: laser; from arídan “sun” + qerach “lightning”.
éändrycmesi: enlightenment, from andra “fire” + cmésí “kiss”.
ictoch: (expl.) “glitch”; colloquially, any annoying thing that you need to work on.
klaith: shadow; shade cast by a radiation-source.
laranlír: language; from laras “word(s)” + anlíril “song”.
mathalmin: crossroads, or intersection; from mathal “road” + minal “meet”.
traändra vandthel: “fire-anger”, wrath, specifically the noble rage of the righteous.
traëhain vandthel: “duel-anger”, the anger which requires satisfaction in battle, if not necessarily death (compare trasered vandthel).
traólmahara aelva: “the beauty of the remade”; that particular quality of beauty inherent in that which was broken and has been made anew. Also: an aesthetic philosophy similar to the Japanese kintsugi.
trasered vandthel: “blood-anger”, that fury which can only be quenched with the death of one party.
So, what words would they use to describe a solar flare, or coronal mass ejection? Those being things that might be described as a little like sun-lightning, and probably visible before anyone made a laser.
Maybe “sun” + eruption or volcano? Maybe”sun” + “fire”?
Cool! Just one thing: you should think about adding a dictionary to the website, so that readers don’t have to do a massive archive binge just to find if you’ve yet done one word.