to become involved with something or someone, often unwisely
вмешиваться в что-то или с кем-то, часто без раздумий (vmeshivat'sya v chto-to ili s kem-to, chasto neobdumanno)
"Try not to mix up with gossip at work."
"Постарайтесь не вмешиваться в сплетни на работе." (Postaraytes' ne mix up with spletnyami na rabote.)
completely honest and trustworthy
a small but essential part of a large system
directly involved in the most active or dangerous part of so...
an older brother or someone who behaves protectively
to repair a damaged relationship
without any logical reason to doubt; with full certainty
