Beware  -- The verb translated as "beware" means "to see", "to look to", "to look like", "to beware", and "to look for." It is the more tangible sense of seeing, such as seeing what is right in front of you rather than understanding "look" in English.

of -- The word translated as "of" means "from" in both location and when referring to a source.

these -- The word translated as "the" is the Greek definite article. The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

teachers, -- (WW) "Teachers" is translated from a Greek word describing anyone who used written records in their job, "secretary", "registrar,' and "scholar." However, Christ used it to name those scholars who specifically studied the Bible and wrote about its meanings. A modern equivalent would be "academics."

of religious law -- (IP) There is nothing that can be translated as "of religious law" in the Greek source.

For  -- (IW) There is no Greek word that can be translated as "for" in the Greek source.

they-- (CW) The word translated as "the" is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." Here, it precedes a participle, that is, a verbal adjective. The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. This is not the word usually translated as "they."

like . -- (CW, WF) The Greek word translated as "like" expresses consent and even a delight in doing something. It means "to consent" and "to be resolved to a purpose". The form here is a verbal adjective, "wanting." With the article before it, the sense is like a noun, "the ones wanting." This verb was a participle, not an active verb. This is not the specific meaning of the word in this situation.

to -- This "to" is from the infinitive form of the following verb.

parade --  "Parade" is a Greek verb that means "to walk up and down", "to walk about," and "to walk about while teaching." Jesus uses it somewhat humorously in the sense that we use "parade." 

around - This completes the meaning of the verb. It is from the prefix.

in -- The word translated as "in" also means "within", "with," or "among." With the accusative, it means "into," "on," and "for."

flowing robes, -- "Flowing robes" is a Greek word that means "equipment", "fitting out", "armament", "equipment in dress", "raiment", "garment", "robe," and "the act of dressing." Jesus uses it only three times, always to mean a piece of clothing. This word is the source of our word "stole."

and -- The Greek word translated as "and" is used as the conjunction "and", but it also is used to add emphasis ("also"). In a series, it is best translated as "not only...but also." After words implying sameness "as".

receive respectful -- (IP) There are no Greek words that can be translated as "receive respectful" in the Greek source.

greetings --  "Greetings" is another uncommon word, used only four times by Jesus, that means "greeting", "embrace," and "affection." Jesus always uses it to refer to the Pharisees or scribes.

as they walk -- (IP) There are no Greek words that can be translated as "as they walk" in the Greek source.

in -- The word translated as "in" also means "within", "with," or "among." With the accusative, it means "into," "on," and "for."

the -- The word translated as "the" is the Greek definite article. The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

marketplaces, -- The word translated as "marketplaces" means "a place of assembly." Its verb form that means "to buy in a market" and its root means "a field."