Apropos

подходя́щий

podxodjáščij

(of an appropriate or pertinent nature)

уме́стный

uméstnyj

(of an appropriate or pertinent nature)

во́время

vóvremja

(timely, at a good time)

кста́ти

kstáti

(by the way)

кста́ти

kstáti

(timely, at a good time)

уме́стно

uméstno

(timely, at a good time)

кста́ти

kstáti

(regarding or concerning)