The article investigates the issue of whether emphatic particles exist in the English language as well as looks into the ways of distinguishing these particles from similar phenomena including discourse markers and function words. Though particles cannot always be easily identified among other parts of speech, emphatic particles are quite distinct from other types of particles presented in grammar studies — structural, negative or adverbial ones — as well as discourse markers. To clarify the point, the authors dwell on the emphatic particles of the Russian language in order to highlight their main purpose — they help the speaker convey the full message to the addressee without adding any semantic connotations to an utterance. Thus, emphatic particles, along with other discursive elements, are used by the speaker to carry out a complex and multidimensional operation of controlling the understanding of the text on the part of the addressee. As emphatic particles fall into three functional classes — attention markers, background information markers, topic and focus markers — the paper provides a frame for presenting their semantic composition in lexicographic sources. Another objective is to distinguish between discourse markers, discourse particles and emphatic particles in the English language. As various languages prefer different parts of speech as the source of producing particles (prepositions, adverbs, interjections, etc.), there is great terminological variability in the number and purpose of particles used in communication. The findings reveal that in the English language words that are not essentially emphatic particles, such as adverbials or compound discourse particles derived from idiomatic word combinations, often perform the emphatic function. The outcome of the research proves the hypothesis that the English words ‘just’, ‘simply’ and some others are equal to Russian emphatic particles.