Subluminal means 'slower than the speed of light'.
Transluminal means 'passing or occurring across a lumen, as of a blood vessel'. Probably because physicians can't spell.
Intraluminal means 'within a lumen'.
Luminal® is a brand name for phenobarbital.
Lumina® is the brand name of a Chevrolet model.
Lum is a cute alien being who wears a tiger-stripe bikini and has horns.
And now, to bed.
meaning: set, place, sit
据え付ける == suetsukuru == (verb) to install, to equip, to mount
Left radical is one of the many radical versions of 'hand'. Right radical is 'be/reside' (居), used here in its literal meaning of 'be fixed in a place'. I.e., this character originally meant 'set something in place by hand'. Henshall suggests as a mnemonic: 'Set something down where hand is.'