tatrāvuso

sandhi contraction of tatra + āvuso

now friend; in this case brothers

Built from

tat — root · that, demonstrative
Stem of the demonstrative tatra; related to English 'that' and Latin 'istae', reaching back to Indo-European *to-.
-ra — ending · locative suffix
Marks location or abstract sphere; -ra lengthens the stem for euphony in sandhi.
ā — prefix · toward, up to
Reverses or completes the sense; here draws the friend close as an addressee.
vasu — stem · friend, dwelling-mate
From √vas 'to dwell'; vasu is a companion in one's dwelling-place, hence friend or comrade.
-o — ending · vocative singular
Marks direct address; the second term breaks sandhi when the first ends in -a, hence tatra + ā- becomes tatrāv-.

Analysis. tatra (there, in that matter) + āvuso (vocative of āvusa, friend, sir) — a vocative phrase contracted by sandhi; used as an interjection to address someone directly in a discourse, often marking a shift in topic or emphasis.

Etymology. tatra from ta- (that, demonstrative root, akin to Latin is-te and English that) and -tra (locative suffix); āvuso from ā (toward the speaker) + vasu- (friend, dwelling-companion, from *vasati 'dwells', akin to Latin vasum 'vessel' and English wise in the sense 'way of dwelling'), yielding 'one drawn near as friend'.

Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.

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