happo

happ- (“sour, acidic”) +‎ -o. Modern meaning "acid" coined by Finnish folklorist and linguist Daniel Europaeus in 1853, originally used more generally of sour things or of leaveners.

• IPA^(key): /ˈhɑpːo/, [ˈhɑ̝pːo̞]
• Rhymes: -ɑpːo
• Hyphenation^(key): hap‧po

happo

1. acid
   1. (chemistry) A substance that can give a proton to another substance (Brønsted acid)
   2. (chemistry) A substance that can act as an electron pair acceptor (Lewis acid).
   3. Any sour or acidic liquid.
2. (colloquial) A drunkard, sot

• → Ingrian: happo

• emäs
• indikaattori

• “happo”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎^[1] (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 2023-07-02

• hoppa

Borrowed from Finnish happo, equivalent to happ- (“sour”) +‎ -o.

• (Ala-Laukaa) IPA^(key): /ˈhɑpːo/, [ˈhɑpːŏ̞̥]
• (Soikkola) IPA^(key): /ˈhɑpːo/, [ˈhɑpːo̞]
• Rhymes: -ɑpːo
• Hyphenation: hap‧po

happo

1. acid
   • 1933, V. A. Tetjurev, Luunnontiito alkuoppia vart (ensimäin osa), Riikin Izdatelstva Kirja, page 12:

     Otamm[a] millaist ikke happoa, esimerkiks uksusta ja tilkutamma kalkin päälle.

     Let's take any kind of acid, for instance vinegar and drip everything on top.

Declension of happo (type 4/koivu, pp-p gradation)
	singular	plural
nominative	happo	hapot
genitive	hapon	happoin, happoloin
partitive	happoa	happoja, happoloja
illative	happoo	happoi, happoloihe
inessive	hapos	hapois, happolois
elative	hapost	hapoist, happoloist
allative	hapolle	hapoille, happoloille
adessive	hapol	hapoil, happoloil
ablative	hapolt	hapoilt, happoloilt
translative	hapoks	hapoiks, happoloiks
essive	happonna, happoon	happoinna, happoloinna, happoin, happoloin
exessive1)	happont	happoint, happoloint
1) obsolete *) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the comitative is formed by adding the suffix -ka? or -kä? to the genitive.

• kislotta

• appo

From Proto-Finnic *hap'oin. This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. explain retention of initial h-, which is not regular

• (Luutsa, Liivtšülä) IPA^(key): /ˈhɑpoː/, [ˈhɑpːo]
• Rhymes: -ɑpoː
• Hyphenation: hap‧po

happo

1. sour

Declension of happo (type XIII/seeme, pp-p gradation, gemination)
	singular	plural
nominative	happo	happomõd
genitive	happomõ	happomijõ, happomii
partitive	hapottõ	happomiitõ, happomii
illative	happoma, happomasõ	happomiisõ
inessive	happomõz	happomiiz
elative	happomõssõ	happomiissõ
allative	happomõlõ	happomiilõ
adessive	happomõllõ	happomiillõ
ablative	happomõltõ	happomiiltõ
translative	happomõssi	happomiissi
*) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the terminative is formed by adding the suffix -ssaa to the short illative (sg) or the genitive. ***) the comitative is formed by adding the suffix -ka to the genitive.

• Hallap, V., Adler, E., Grünberg, S., Leppik, M. (2012) “hapoo”, in Vadja keele sõnaraamat [A dictionary of the Votic language], 2nd edition, Tallinn