plainest in English

adjective

1

not decorated or elaborate; simple or ordinary in character.

good plain food

synonyms: simple, ordinary, unadorned, unembellished, unornamented, unostentatious, unfussy, basic, modest, unsophisticated, without frills, homespun, restrained, unshowy, unflashy, muted, everyday, workaday

2

easy to perceive or understand; clear.

the advantages were plain to see

synonyms: obvious, clear, crystal clear, evident, apparent, manifest, patent, discernible, perceptible, noticeable, recognizable, unmistakable, transparent, pronounced, marked, striking, conspicuous, self-evident, indisputable, writ large, standing/sticking out like a sore thumb

3

(of a person) not beautiful or attractive.

the dark-haired, rather plain woman

synonyms: homely, unattractive, unprepossessing, ugly, ill-favored, unlovely, ordinary, not much to look at

4

sheer; simple (used for emphasis).

the main problem is just plain exhaustion

synonyms: sheer, pure, downright, out-and-out, unmitigated

5

(of a knitting stitch) made using a knit rather than a purl stitch.

She offered a more varied needlework curriculum of plain work, marking, openwork, and embroidery along with reading and writing.

adjective

obvious, clear, crystal clear, evident, apparent, manifest, patent, discernible, perceptible, noticeable, recognizable, unmistakable, transparent, pronounced, marked, striking, conspicuous, self-evident, indisputable, writ large, standing/sticking out like a sore thumb
intelligible, comprehensible, clear, understandable, coherent, uncomplicated, lucid, unambiguous, simple, straightforward, user-friendly, perspicuous
candid, frank, outspoken, forthright, direct, honest, truthful, blunt, bald, explicit, unequivocal, upfront
simple, ordinary, unadorned, unembellished, unornamented, unostentatious, unfussy, basic, modest, unsophisticated, without frills, homespun, restrained, unshowy, unflashy, muted, everyday, workaday
homely, unattractive, unprepossessing, ugly, ill-favored, unlovely, ordinary, not much to look at
sheer, pure, downright, out-and-out, unmitigated
patent, evident, apparent, manifest, unmistakable
spare, unornamented, bare, unembellished
sheer, unmixed, unmingled
homely
unpatterned
unvarnished

Use "plainest" in a sentence

1. Hunger will relish the plainest fare. 

2. Boarders live in the plainest of rooms, kept in pristine condition.

3. Antonyms for Comeliest include ugliest, grotesquest, homeliest, plainest, unComeliest, unloveliest, vilest, unpleasantest, fugliest and horriblest

4. Antonyms for Brassiest include meekest, mousiest, shiest, softest, timidest, quietest, fearfullest, humblest, lowest and plainest

5. Synonyms for Clearest include simplest, lucidest, plainest, directest, user-friendliest, most understandable, most straightforward, most apprehensible, most coherent and most comprehensible

6. In the morning, she rose early and dressed in her plainest clothes, flounces and frills had no place in business.

7. AS A CHINAMAN SAW US ANONYMOUS The pleasant sight was Count Cavour, in plainest dress, with a head full of power, mingled with Bonhomie

8. Ian Fleming, The New Yorker, 21 April 1962 On another occasion Fleming said: "I wanted the simplest, dullest, plainest-sounding name I could find, 'James Bond' was much better than something more interesting, like 'Peregrine Carruthers'.