As a deity name
Name 354 of the Lakshmi Sahasranāma — Skanda Purana / Sanat Kumara Samhita, as taught by Sages Sanatkumara and Devotees
As a Hindi name
मैत्री · noun · feminine
दो व्यक्तियों के बीच का मित्र भाव । मित्रता । दोस्ती — Śabdasāgara
मैत्री · maitrī · s.f.
Friendship, friendliness, good-will — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 1103
मैत्री · feminine
friendship; benevolence, loving-kindness, friendliness
Cited formation "मैत्री" is मैत्र + -ई: मैत्र means "Coming, or derived, from a friend", and the suffix -ई forms abstract nouns (fem.). CHD Basic Grammar App. I §8(14) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
Cited formation "मैत्री" is मैत्र + -ई: मैत्र means "Coming, or derived, from a friend", and the suffix -ई forms 'belonging to', 'having', 'coming from' (adjectives). CHD Basic Grammar App. I §9(6) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi मैत्री — per Wiktionary’s etymology record
“Borrowed from Sanskrit मैत्री (maitrī).” — per Wiktionary’s etymology record
maitrī (ī), f. See below
maitrī f. friendship, friendliness, benevolence, good will (one of the 4 perfect states with Buddhists, Dharmas. 16; cf. MWB. 128), MBh.; Kāv. &c.
As a Sanskrit word
Meaning
friendship, friendliness, benevolence, good will (one of the 4 perfect states with Buddhists, cf. ), &c.
Scripturally attested Verified derivationWhy this matches what you typed
M1 · same meaning "maitrī" is the nominative of "maitrin" — the same word in a different grammatical case.
M1 · same meaning "maitrī" is the nominative dual of "maitri" — the same word in a different grammatical case.
M1 · same meaning "maitrī" is the feminine form of "maitra" — the same word with the feminine ending, recorded by the dictionary's own gender marker on that entry.
Related forms
Dictionary citations
maitrī (ī), f. See below
maitrī f. friendship, friendliness, benevolence, good will (one of the 4 perfect states with Buddhists, Dharmas. 16; cf. MWB. 128), MBh.; Kāv. &c.
Benevolence personified (as the daughter of Dakṣa and wife of Dharma), BhP.
close contact or union, Megh.; Vcar.
(ifc.) equality, similarity, Prasannar.
maitrin mfn. friendly, benevolent, Pañcar.
maitrin a. Friendly, kind.
maitri m. a metron. of a teacher, MaitrUp.
maitra mf(ī)n. (fr. mitra, of which it is also the Vṛddhi form in comp.) coming from or given by or belonging to a friend, friendly, amicable, benevolent, affectionate, kind, Mn.; MBh. &c.
belonging or relating to Mitra, VS. &c. &c.
Caveats
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