chemically combine, bind

hard; to harden / to set; to solidify

hard / tight / strong; firm / strict / inflexible

硬い: keeping its physical shape or appearance under a force: stiff / 固い: keeping its shape or behaviour even under other influences: hard, firm

nature, personality / fate, destiny / a habit, custom, or practice / the good and bad of a person; especially, one's faults

minister of state

mutual, reciprocal, with one another / appearance, look

appearance, how something looks / an aspect of something / (grammar) grammatical aspect / (physics) a phase, as of matter / (ikebana) the central supporting branch of an ikebana arrangement

stabilizer; stabilizing agent

stabilizer / (electronics) ballast