🇺🇸
/əˈprɛs/
🇺🇸
/əˈprɛs/
🇬🇧
/əˈprɛs/
🇬🇧
/əˈprɛs/
Past Tense
appressed
Past Participle
appressed
Gerund
appressing
3rd Person
appresses
Appress is a technical verb used especially in botany and mycology to describe the act of pressing or flattening something tightly against a surface — like a fungal structure gluing itself onto a plant leaf to invade it. Think of it as nature’s industrial-strength double-sided tape: not just touching, but firmly adhering under pressure.
The fungus forms a specialized infection structure called an appressorium that appresses tightly to the host plant's cuticle.
In mosses, the leaves are often appressed to the stem, giving the plant a sleek, compact appearance.
Before penetrating the leaf, the pathogen appresses its hyphae to the epidermis with remarkable mechanical force.
Botanists note that appressed bracts help protect developing flowers from wind and pests.
Under high humidity, the spores germinate and the germ tube appresses to the surface within hours.
press
Comes from the Latin verb 'premere' (past participle 'pressus'), meaning 'to press', 'to push', 'to squeeze', or 'to hold down'. It conveys forceful contact, compression, or close adherence. Examples include press, compress, depress, express, impress, repress, suppress, and appress.
ad
Comes from the Latin prefix 'ad-', meaning 'to', 'toward', or 'at'. It often assimilates before consonants (e.g., 'ac-' before 'c', 'af-' before 'f', 'ap-' before 'p'). In 'appress', 'ad-' becomes 'ap-' due to phonological assimilation before the bilabial 'p', signifying directionality toward pressing or bringing into close contact.