ninety

From Middle English nynty, nynety, from Old English hundniġontiġ, from Proto-Germanic *newuntēhundą (“ninety”), equivalent to nine + -ty. Cognate with Scots nynty, nynety (“ninety”), Saterland Frisian njuugentich (“ninety”), West Frisian njoggentich (“ninety”), Dutch negentig (“ninety”), German Low German negentig (“ninety”), German neunzig (“ninety”), Swedish nittio (“ninety”), Norwegian Bokmål nitti (“ninety”), Norwegian Nynorsk nitti (“ninety”), Icelandic níutíu (“ninety”).

cog

The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.

九十

きゅうじゅう, kyūjū, くじゅう, kujū


right

en-adj

right (comparative further right or more right or righter, superlative furthest right or most right or rightmost or rightest)

further right (comparative)
more right (comparative)
righter (comparative)
furthest right (superlative)
most right (superlative)
rightmost (superlative)
rightest (superlative)
ryght (alternative)
reight (alternative)
rite (alternative)

→ Spanish: right

→ Welsh: reit

From Middle English right, from Old English riht, reht (“right,” also the word for “straight” and “direct”), from Proto-West Germanic *reht, from Proto-Germanic *rehtaz, from Proto-Indo-European *h₃reǵtós (“having moved in a straight line”), from *h₃reǵ- (“to straighten, direct”). The Germanic adjective which has been used also as a noun since the common Germanic period. Cognate with West Frisian rjocht, Dutch recht, German recht and Recht, Swedish rätt and rät, Danish ret, Norwegian Bokmål rett, Norwegian Nynorsk rett, Yiddish רעכט (rekht) and Icelandic rétt. The Indo-European root is also the source of Ancient Greek ὀρεκτός (orektós) and Latin rēctus; Albanian drejt was borrowed from Latin.

inh

the left hand doesn't know what the right hand is doing

even a stopped clock is right twice a day

have one's head screwed on the right way

a right triangle   a right prism   a right cone

(geometry) Of a geometric figure, incorporating a right angle between edges, faces, axes, etc.

перпендикулярен

geometry: incorporating a right angle between edges, faces, axes, etc.


right angle

(geometry) Half of the angle formed by a single straight line, equivalent to 90 degrees.


ninetieth

LL-Q1860 (eng)-I learned some phrases-ninetieth.wav

From earlier ninteth, from Middle English nyntithe; for the modern form, see the etymological notes at twentieth.


nonagenarian

/ˌnɑnəd͡ʒɪˈnɛriən/

/ˌnɒnəd͡ʒɪˈnɛːrɪən/

/ˌnəʊnəd͡ʒɪˈnɛːrɪən/

From Latin nōnāgēnārius (“containing ninety”) + -an (suffix forming adjectives and representative nouns), either directly or via French nonagénaire, from nōnāgēnī (“ninety each”) + -ārius (“-ary”), from nōnāginta (“nine tens, ninety”).

der

Synonym of ninetysomething: a person between 90 and 99 years old.


right-angled

(not comparable, geometry) Having a right angle.


ninetysomething

ninetysomethings (plural)
ninety-something (alternative)

She was a sprightly ninetysomething.

(colloquial) A person between 90 and 99 years old.


four score and ten

From the Bible, in which King David is supposed to have lived three score and ten (70) years.

Used other than figuratively or idiomatically: see four, score, ten. 90.


at right angles to

The whole unit is rotated through 90deg to a position at right angles to the wagon and the three parts of the piling frame are unfolded from the straight line form into which they are packed for travelling to the triangular form in which they are set up for piling.

1961 November, “Talking of Trains: The North Eastern's new rail-mounted piling unit”, in Trains Illustrated, page 646:

Forming an angle of 90 degrees to something.


ninetiethly

Ninetiethly, the prosecution has adduced and relied upon the evidence of PW.90 Kiran Menzes […]

2015 September 29, Bangalore District Court, State By Cbi/Acb vs Sri. S. Siddalingaswamy on 29 September, 2015:

In the ninetieth place; ninetieth in a row.


nonagenary

From Latin nōnāgēnārius (“containing 90”) either directly or via Middle French nonagénaire, from Latin nōnāgēnī (“90 each”) + -ārius (“-ary”), from nōnāgintā (“nine tens, 90”).

(rare) Of or related to the number ninety.