ἔσειμι

From LSJ

ἁρμονίη ἀφανὴς φανερῆς κρείττων → the hidden attunement is better than the obvi­ous one, invisible connection is stronger than visi­ble, harmony we can't see is stronger than harmony we can, unseen harmony is stronger than what we can see

Source

French (Bailly abrégé)

ion. et anc. att. c. εἴσειμι.

Lexicon Thucydideum

ingredi, to enter upon, 1.106.2, [vulgo et in seqq. commonly and in the following εἰς.]. 1.134.1, 2.2.1, 2.2.3. 2.3.1, 2.4.3. 2.5.1, 2.13.2. 2.19.1. 2.54.5, 2.72.2,
item likewise 2.73.1. 3.25.1, 3.28.2. 3.66.2. 3.70.6, 3.102.4. 3.102.5, 4.48.1. 4.70.2. 4.92.4. 4.98.1. 4.110.2. 4.111.2. 4.113.1. 4.118.11, (in concionem, before the assembly). 4.131.3. 5.8.1. 5.60.6. 6.2.1, 6.51.1. 6.51.17.1.1, 7.29.5, 8.70.1, [nonnulli codd. several manuscripts ἐπελθ.]
visere, to visit, inspect, 2.51.5,
subire, in mentem venire, to occur to, come to mind, 4.30.1, 6.30.2,
adscribi (foederi), to be added (to a treaty), 5.30.3, 5.35.3, 5.36.1,
similiter similarly 5.40.2
et and 5.46.2. 5.46.4. 5.48.2.