οἱ Κορίνθιοι μέχρι τούτου προθύμως πράσσοντες ἀνεῖσαν τῆς φιλονικίας καὶ ὠρρώδησαν μὴ οὐδεὶς σφίσιν ἔτι τῶν ἄλλων προσχωρῇ. Is this a gen. of separation after ἀνεῖσαν?, however, in the lexicons I have checked, it is followed by acc in all the examples. Or is this a gen. partitivus as Graves says in his notes? Or is it just the gestalt of the genitive that matters?
Did you check LSJ?
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c. [select] c. gen., cease from a thing, “μωρίας” Id.Med.457; “τῆς ὀργῆς” Ar.Ra.700, D.21.186; “φιλονικίας” Th.5.32; ἀνῆκε τοῦ ἐξελθεῖν forbore to come forth, LXX 1 Ki.23.13.
Constantinus, This verb (lit. send/throw/let up, let go) is usually transitive (“followed by acc.” as you less precisely put it), and then it can be accompanied by a genitive as well as by the accusative direct object, e.g. ὅταν μ᾽ ἀνῇ νόσος μανίας (Eur.Or.227) “when the sickness releases me from madness.”
It can also be used intransitively, as in e.g. ἐπειδὰν πνεῦμ᾽ ἀνῇ” (Soph.Phil.639) “when the wind lets up.” It’s intransitive here in Thucydides (ἀνεῖσαν τῆς φιλονικίας) but accompanied by a genitive (“they let up from filonikia”). This earns it a separate subsection in LSJ(see seneca above) but it’s important to recognize that the genitive is just the same kind of genitive as in ὅταν μ᾽ ἀνῇ νόσος μανίας. There the verb was used transitively, here intransitively, but the use of the genitive is the same in both cases.
(This kind of genitive would normally be called a genitive of separation, as you suggested, but it could also be called a partitive genitive, with the implication that they did not let go of all of their filonikia but only some of it.)
I’m posting all this so as to help you make connexions between transitive and intransitive use of the verb (and by extension of other verbs). All the various senses of the verb are fundamentally unitary, a gestalt to use your term. By observing how it all ties together you’ll gradually build up a better sense of how Greek works overall.
(And of course the basic verb has many prefixes besides ana, which variously serve to narrow down its wide-ranging meanings and enlarge the Gestalt.)
And a general recommendation: don’t consult lots of lexicons, just use LSJ or one of the shorter versions. The Intermediate is perfectly adequate for most purposes.
Similarly with grammars. You don’t really need more than one. Choose between Smyth and the new Dutch one (The Cambridge Grammar of Classical Greek, CGCG). The latter would be the better choice, since it’s linguistically up to date. You could supplement it with Smyth if you want more detail and more examples, but that would waste a lot of time better spent reading Greek. (Incidentally, why the Timaeus? The Republic is more approachable and you could read selections.) And never forget there’s more to Greek than grammar.
filoponei