Definition of intumesce in US English:

intumesce

verb

[no object]rare
  • Swell up.

    • ‘Each woman I take seems to deepen my rage, intumesce my lust, and refine my deviant appetite.’
    become bigger, make bigger, become larger, make larger, become greater, make greater, increase in size, grow, expand
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Origin

Late 18th century: from Latin intumescere, from in- ‘into’ + tumescere ‘begin to swell’ (from tumere ‘swell’).

Pronunciation

intumesce

/ˌint(y)o͞oˈmes//ˌɪnt(j)uˈmɛs/