THINKING ABOUT SOMETHING LONG AND HARD, that is to say using one element set: doing something that requires the insertion in one's mouth of a potential source of multiple pathogens, or, insertion into a mouth that might decapitate the contents.
Someone still alive has the sound of a「beating heart」as one's most noble THOUGHTS, OPINIONS, MIND and WILL, the LEGITIMATE CONCERNS of each individual human. However, top element of「defiant slave」punished by piercing, chopping, or ripping out the tongue, causing a speech impediment that was used to brand the individual for life as a biter. Top elements as「noise, sounds」are「swollen penis with tonguing mouth」and refer to the noise, screams and other loud sounds when biting and this punishment was performed, and the sounds or noises as less than perfect pronunciation for the remainder of his or her natural life as a poignant reminder not to attempt fellatio again.「Defiant slave feelings」are equated to the MIND, the deepest INTENTIONS formed over years of enslavement, with perseverance to free yourself and determination regardless of the painful consequences, deeply held OPINIONS, the STRENGTH OF WILL a slave must have to brave the punishments and live free or die, a slogan common among patriots to a just cause. THINKING LONG AND HARD about something, being reminded of your plight by every sound you make with your mouth that likely spewed a bit of spittle, somewhat like the lower element,「spewing appendage.」
In addition, elements as「erect in tonguing mouth until spewing jism」adequately describes what is on the MIND of most male humans most of the time, the deepest INTENTION formed over the years, with perseverance and determination to ejaculate regardless of the consequences, a deeply held OPINION, the STRENGTH OF WILL a male must have to brave any punishment or clenching, and spew.
CLENCHING and related problems and fears are present in these glyphs:
歯 and 齒 as teeth.
恨 regret, hate, resentment, rueful, hold a grudge, malice, bitter feeling, rancor, to curse and swear.
艮 chewing.
仡 being fed up with conditions and bravely doing something about it while unafraid of the consequences.
旡 suddenly choking on something in one's throat.
兂 clasped with teeth.
邪 wickedly demonic.
拑 pinning with clenched teeth.
音 loud noise.
既 and 既 too late, happened already, unchangeable.
茱 and 萸 bloody stump, dogwood.
飢 ravenously chomping meat.
啗 enticing lure, gnawing meat.
啖 threaten a superior, taunt and torment, reckless endangerment while tasting and eating.
猖 ferocious and insane, mad, reckless, not following the rules.
惕 healthy respect of danger.
𣇄 and 晣 biting off a chunk, bent by tonguing mouth.
惮 and 憚 fear, dread, shirking, shrunk.
喫 clenching with gasps.
吃 and 喫 extirpate, destroy utterly.
揕 bare-fisted jab, punch in the face.
意 long in thought, intent, concerns.
貇 tenaciously clenching jaw and not letting go.
虞 horror, terror, terrorism.
鉗 clamp and gag.
𪗱 and 齟 discord, broken teeth.
𪘚 and 齬 gritting one's teeth, great hatred.
齭 pain caused by teeth.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: idea; meaning; thought; to think; wish; desire; intention; to expect; to anticipate; Italy; Italian; abbr. for 意大利
Japanese EDRDG: idea, mind, heart, taste, thought, desire, care, liking
Unihan extended: thought, idea, opinion; think

Used within names (nanori)
もと　･　よし