Perseus analyses of πᾶσι:

πᾶς (all): masc/neut dat pl (attic epic ionic)
πᾶσις (acquisition, possession): fem voc sg

LSJ entries

πᾶς 1

πᾶς, πᾶσα, πᾶν, Aeol. παῖς, παῖσα Sapph. Supp. 13.8,21.2, 20a.14, Alc. Supp. 12.6, 25.8 ; Cret., Thess., Arc. fem. πάνσα GDI 4976 (Gortyn), IG 9(2).234.2 (Pharsalus, iii B.C.), 5(2).343.16 (Orchom. Arc., iv B. C.) : gen. παντός, πάσης, παντός : gen. pl. masc. and neut. πάντων, fem. πᾱσῶν, Ep. and Ion. πᾱσέων, Ep. also πᾱσάων [σᾱ] Od. 6.107 : dat. pl. masc. and neut. πᾶσι, Ep. and Delph. πάντεσσι Il. 14.246, IG 22.1126.22,44; also Locr. πάντεσιν Berl.Sitzb. 1927.8 (V B.C.); Delph. πάντεσι SIG 452.5 (iii B.C.); πάντοις GDI 2652 (Delph., ii B.C.), Tab.Defix.Aud. 75.8 : πᾶν as acc. masc. in LXX, π. ἄνδρα, οἰκέτην, οἶκον, 1 Ki. 11.8, Ex. 12.44, Je. 13.11. [Dor. and Aeol. πάν [ᾰ] Hdn.Gr.2.12, Pi. O. 2.85, Sapph. Oxy. 1787 Fr. 3 ii 5,al., and Att. in compds., as ἅπᾰν, πάμπᾰν, etc. (but in compds. sts. long in Att., AB 416).]—

A. Coll. Pron., when used of a number, all; when of one only, the whole; of the several persons in a number, every.

I. in pl., all, πάντες τε θεοὶ πᾶσαί τε θέαιναι Il. 8.5, etc. ; πάντες ὅσοι . . Od. 1.11, etc. ; πάντας ᾧ ἂν περιτυγχάνῃ, for ὅσοις ἄν, Pl. R. 566d : also with the Art., v.infr. B.

3. with Sup.,πάντες ἄριστοι all the noblest, Il. 9.3, Od. 4.272, etc.

4. consisting or composed wholly of, i.e. nothing but, only, φρουρούμενος ὑπὸ πάντων πολεμίων Pl. R. 579b; ἐκ πασῶν δυνάμεων συνεστώς Corp.Herm. 13.2; cf.11.2.

II. sg., all, the whole, πᾶς δʼ ἄρα χαλκῷ λάμπε Il. 11.65, cf. 13.191 ; πᾶσα ὕλη all the wood, Hes. Op. 511, cf. Th. 695, etc. ;πᾶσα ἀληθείη all the truth, Il. 24.407, Od. 11.507; τὴν φάτνην ἐοῦσαν χαλκέην πᾶσαν all of bronze, Hdt. 9.70 ; ἦν ἡ μάχη καρτερὰ καὶ ἐν χερσὶ πᾶσα, ἦν γὰρ τὸ χωρίον πρόσαντες πᾶν, Th. 4.43, etc. ; πᾶν κράτος the whole power, sovereign power, S. Ph. 142 (lyr.); τὸ πᾶν κράτος Hdt. 6.35; μετὰ πάσης ἀδείας D. 18.305; πᾶσα ἀνάγκη Pl. Phdr. 240a ; πᾶσαι δʼ ὠΐγνυντο πύλαι, πᾶσαι γὰρ ἐπῴχατο [πύλαι], the whole gate was open (shut), i.e. the gate was wide open, quite shut, Il. 2.809, 12.340, as expld. by Aristarch. ; v. infr. B.

2. as in 1.4, with attraction, ὁ πάντʼ ἄναλκις οὗτος, ἡ πᾶσα βλάβη who is nought but mischief, S. El. 301, cf. Ph. 622, 927.

II. πᾶς is put between the Art. and Subst., to denote totality (V. A. II), ὁ πᾶς ἀριθμός A. Pers. 339 ; τὴν πᾶσαν ἵππον Hdt. 1.80 ; τὸ πᾶν πλῆθος Th. 8.93 ; οἱ πάντες ἄνθρωποι absolutely all . . , X. An. 5.6.7, etc. ; so πᾶν the neut.with the Art. itself becomes a Subst., τὸ πᾶν the whole, A. Pr. 275,456, etc., v. infr. D. IV; τὰ πάντα the whole, Id. Eu. 415 ; τοῖς πᾶσιν in all points, Th. 2.64, 5.28 ; οἱ πάντες all of them, Hdt. 1.80 ; but also, the community, opp. οἱ ὀλίγοι, Th. 4.86 ; ἡ μὲν [τάξις] πάντα ἕν, ἡ δὲ πάντα ὅλον, ἡ δὲ πάντα πᾶν all things as a unity, as a totality, as an integral sum, Dam. Pr. 206.

D. Special Usages : in dat. pl. masc. πᾶσι, with or in the judgement of all, Il. 2.285, S. OC 1446 ; ὁ πᾶσι κλεινός Id. OT 8 ; κράτιστον πᾶσιν Οἰδίπου κάρα ib.40.

2. fem. pl., ἔδοξε πάσαις (sc. ταῖς ψήφοις) carried unanimously, IG 12(3).168.14 (Astypalaea, ii/i B. C.), cf. Luc. Bis Acc. 18,22.

II. neut. pl. πάντα all kinds of things, Hom., freq. in phrase δαίδαλα πάντα, Il. 5.60 ,al. ; οἰωνοῖσι πᾶσι I.5.

2. πάντα γιγνόμενος becoming all things, i. e. assuming every shape, Od. 4.417.

b. in Philos., τὸ πᾶν the universe, Emp. 13, Pythag. ap. Arist. Cael. 268a11, Pl. Ti. 28c, 30b, etc.; including τὸ κενόν (opp. τὸ ὅλον), Placit. 2.1.7 ; also, Pythag. name for ten, Iamb. in Nic.p.118P., Theol.Ar. 59.

c. τῷ παντί in every point, altogether, X. HG 7.5.12, etc.

d. τὸ π., = μολυβδόχαλκος, Ps.- Democr. Alch.p.56 B., Maria ap.Zos.Alch.p.192 B.

4. παντὸς μᾶλλον more than anything, i. e. above all, Pl. Cri. 49b, Prt. 344b, Grg. 527b ; π. μᾶλλον οὐ Id. Phdr. 228d : in answers, π. γε μᾶλλον quite so, Id. Phd. 67b.

IV. with Preps., εἰς πᾶν προελήλυθε μοχθηρίας D. 3.3 ; ἐς τὸ πᾶν altogether, A. Ag. 682 (lyr.), Eu. 52,83 ; ἐν παντὶ ἀθυμίας εἶναι to be in utter despair, Th. 7.55 : more freq. ἐν παντὶ εἶναι, ἐν παντὶ κακοῦ εἶναι, to be in great danger or fear, Pl. Smp. 194a, R. 579b ; ἐν π. γενέσθαι Id. Euthd. 301a ; ἐμ παντὶ ἐοῦσα IG 42(1).122.27 (Epid., iv B. C.); ἐν παντὶ εἶναι μή . . to be in great fear lest . . , X. HG 5.4.29 ; ἐς πᾶν κακοῦ ἀπίκατο Hdt. 7.118 ; ἐς πᾶν ἀφικέσθαι X. HG 6.1.12 ; εἰς πᾶν ἐλθεῖν D. 54.13 ; ἐπὶ πᾶσιν in all things, καιρὸς δʼ ἐπὶ π. ἄριστος Hes. Op. 694 ; but also, finally, Philostr. VS 2.11.1, al. ; περὶ παντὸς ποιεῖσθαι esteem above all,X. HG 7.1.26, An. 1.9.16 ; πρὸ παντὸς εὔχεσθαι wish above all, Pl. Phdr. 239e ; διὰ παντός (sc. χρόνου) for ever, continually, S. Aj. 705 (lyr.), Th. 1.38, etc. ; also, altogether, Pl. R. 407d ; διὰ πάντων Id. Sph. 254b ; ὁ κατὰ πάντων λόγος the common formula, PMag.Par. 1.2186 ; ἡ κ. π. τελετή ib.1596, PMag.Lond. 121.872 ; μέχρι παντός for ever, Str. 8.6.18 ; εἰς τὸ πᾶν ἀεί A. Ch. 684 ; ἐς τὸ πᾶν χρόνου Id. Eu. 670.

V. διὰ πασῶν (sc. χορδῶν ), v. διαπασῶν.

VI. οὐ πᾶς not any, i.e. none, LXX Ps. 142(143).2, Ev.Luc. 1.37, Ep.Gal. 2.16, al. ; ἄνευ πάσης ταραχῆς without any disturbance, D.S. 15.87.

πᾶσις

πᾶσις, εως, ἡ, (πάομαι)

A. acquisition, possession, Hsch. ; cj. in B. 9.42 ; μοιριδία π. prob. for πρᾶσις in Philic. in Stud.Ital. 9.44.