throat, choked, smothered, stuffy
咽 centers on the throat and the sensation of blockage or constriction there: the physical throat itself, and the feeling of being choked, smothered, or stuffy.
咽 combines 口 (mouth) with 因, which likely contributes the sound and may suggest something enclosed or internal, relating to the throat.
The mouth 口 beside 因, which looks like a person 大 trapped inside an enclosure 囗, like something stuck in the throat. Picture a mouth with something caught inside, making it feel choked and stuffy.
For イン, imagine an inn where the air is so stuffy that your throat feels choked: inn -> イン, and the stuffy inn makes your throat constrict.
pharynx
otorhinolaryngology; otolaryngology; ear, nose and throat department
sobbing; weeping; fit of crying
throat
to be choked; to be stifled; to be smothered
epipharyngeal cancer; epiglottal carcinoma
ascending pharyngeal artery
hypopharyngeal cancer; cancer of the hypopharynx
oropharyngeal cancer; cancer of the oropharynx
to gain control of a key position; to command a key position
throat microphone
globus pharyngis; lump in one's throat; pharyngolaryngeal paresthesia
laryngopharyngeal reflux; LPR
gag reflex
pharyngeal arch
retropharyngeal abscess
pharyngeal tooth; pharyngeal teeth
pharyngitis; sore throat
sore throat; pharyngitis; pharyngalgia; pharyngodynia
pharyngeal cancer; cancer of the pharynx