Latin opposes participles with -nt- (active) to -d- (passive-stative).
If you believe in Kortlandt's effect, that is to say the alternation between *H1 and *d in a number of words and roots, then -d- in timi-d-us and -eH1- in tim-e-o are basically the same morpheme *-d- with and without Kortlandt's effect.
bad: çhar - Greek kako
Well, sure this one is not Greek, as it came from Iberian (modern basque "txar").
Never forget the Meschoi, one of the principal tribe supposed to have been involved in armenian's ethnogenesis were servants of the Iberians (cf. Procopius).
what: zi - Greek ti
This one too have to come from iberian (modern basque "zer&...
This has been known for a long time (see e.g. Meillet 1894: 299), cf. Kim 2018 "Balto-Slavic also has several examples of velars continuing PIE palatals (“Gutturalwechsel”)." For instance, Otkupshchikov (Откупщиков 1989/2001), in Ряды индоевропейских гуттуральных, discusses what he calls «непоследовательная сатемность» (inconsistent satemization) ...