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There's te-form for owarimasu, and I see sugiru form. What does the "nasasugi" part mean?

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I suspect that it is related to japanese.stackexchange.com/a/6783/542 – Flaw Jul 21 '13 at 16:23
That looks correct, so what does that whole phrase mean? – TomatoPotato Jul 21 '13 at 16:25
I do not know. Can you provide the rest of the sentence for context? – Flaw Jul 21 '13 at 16:42
up vote 2 down vote accepted

おわっていない = unfinished.

すぎる is a conjugation attached to the stem of a verb to mean "too much". However, when it precedes a negative form, ない becomes なさすぎる.

Therefore おわってなさすぎる would mean "__ is too unfinished", and おわってなさすぎ is its stem.

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What do you mean by stem? The 連用形, or the invariant part? I'm asking because it is not uncommon to consider the 連体形 ("dictionary" form) the base form. – blutorange Jul 21 '13 at 19:28
In all my experience with the term verb stem, it has always referred to the part that precedes the -ます of the polite form of a verb. – Ataraxia Jul 21 '13 at 19:37
Yeah, that's the 連用形. 'Stem' is a bit of a difficult word to use in the context of Japanese, as there's multiple 'stems' for different uses. Really, 終わります is best segmented as owar-i-mas-u, with the true 'stem' being owar-; the various 〇〇形 forms are stems + single-vowel suffixes (for godan verbs, at least). – Sjiveru Jul 22 '13 at 0:03

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