Two Greek words are translated to some form of the English word "bless".
One Greek word is number (2127) and the other Greek word is number (3107).
The definitions of these Greek words will be shown below in numerical order, each definition between horizontal lines.

(2127)
1. to praise, celebrate with praises
2. to invoke blessings
3. to consecrate a thing with solemn prayers
   3.a] to ask God's blessing on a thing
   3.b] pray God to bless it to one's use
   3.c] pronounce a consecratory blessing on
4. of God
   4.a] to cause to prosper, to make happy, to bestow blessings on
   4.b] favoured of God, blessed
derivation: from a compound of (2095) and (3056)
http://bible1.crosswalk.com/Lexicons/Greek/grk.cgi?number=2127&version=kjv

(2095)
1] to be well off, fare well, prosper
2] acting well
derivation: neuter of a primary eus (good)
http://bible1.crosswalk.com/Lexicons/Greek/grk.cgi?number=2095&version=kjv

(3056)
1. of speech
   1.a] a word, uttered by a living voice, embodies a conception or idea
   1.b] what someone has said
       1.b.1] a word
       1.b.2] the sayings of God
       1.b.3] decree, mandate or order
       1.b.4] of the moral precepts given by God
       1.b.5] Old Testament prophecy given by the prophets
       1.b.6] what is declared, a thought, declaration, aphorism, a weighty saying, a dictum, a maxim
   1.c] discourse
       1.c.1] the act of speaking, speech
       1.c.2] the faculty of speech, skill and practice in speaking
       1.c.3] a kind or style of speaking
       1.c.4] a continuous speaking discourse - instruction
   1.d] doctrine, teaching
   1.e] anything reported in speech; a narration, narrative
   1.f] matter under discussion, thing spoken of, affair, a matter in dispute, case, suit at law
   1.g] the thing spoken of or talked about; event, deed
2] its use as respect to the MIND alone
   2.a] reason, the mental faculty of thinking, meditating, reasoning, calculating
   2.b] account, i.e. regard, consideration
   2.c] account, i.e. reckoning, score
   2.d] account, i.e. answer or explanation in reference to judgment
   2.e] relation, i.e. with whom as judge we stand in relation
       2.e.1] reason would
   2.f] reason, cause, ground
3] In John, denotes the essential Word of God, Jesus Christ, the personal wisdom and power in union with God, his minister in creation and government of the universe, the cause of all the world's life both physical and ethical, which for the procurement of man's salvation put on human nature in the person of Jesus the Messiah, the second person in the Godhead, and shone forth conspicuously from His words and deeds.

A Greek philosopher named Heraclitus first used the term Logos around 600 B.C. to designate the divine reason or plan which coordinates a changing universe. This word was well suited to John's purpose in John 1.
derivation: from (3004)
http://bible1.crosswalk.com/Lexicons/Greek/grk.cgi?number=3056&version=kjv

(3004)
1] to say, to speak
   1.a] affirm over, maintain
   1.b] to teach
   1.c] to exhort, advise, to command, direct
   1.d] to point out with words, intend, mean, mean to say
   1.e] to call by name, to call, name
   1.f] to speak out, speak of, mention
derivation:  a root word
http://bible1.crosswalk.com/Lexicons/Greek/grk.cgi?number=3004&version=kjv

(3107)
1] blessed, happy
derivation: a prolonged form of the poetical makar (meaning the same)
http://bible1.crosswalk.com/Lexicons/Greek/grk.cgi?number=3107&version=kjv