1) Buttoned-up 2) Concise 3) Definitely not chatty 4) French word used in English 5) Gary cooper-ish 6) Habitually uncommunicative 7) Incommunicative 8) Much like marcel marceau 9) Not talkative 10) Not too talkative 11) Reserved 12) Reserved and uncommunicative 13) Reticent 14) Tight-lipped 15) Uncommunicative 1) Close 2) Concise 3) Incommunicable 4) Incommunicative 5) Reserved 6) Reticent 7) Silent 8) Tightlipped 9) Uncommunicative 10) Untalkative 
• (a.) Habitually silent; not given to converse; not apt to talk or speak.
Tac'i·turn adjective [ Latin taciturnus : confer French taciturne . See Tacit .] Habitually silent; not given to converse; not apt to talk or speak. -- Tac'i*turn*ly , adverb Syn. -- Silent; reserved. Taciturn , Silent . 
untalkative silent 
HMS Taciturn was a British T Class patrol type submarine of 1090 tons displacement launched in 1944. HMS Taciturn had a top speed of 15.25 knots surfaced and 9 knots submerged, carried a complement of 53 and was armed with one 4 inch dual-purpose gun; one 20 mm anti-aircraft gun; three machine-guns and about ten 21 inch torpedo tubes.
[adj] - habitually reserved and uncommunicative
taciturn, taciturnly 1. Characterized by silence or a disinclination to conversation.BR> 2. Reserved in speech; saying little; uncommunicative. 3. Habitually untalkative.
[Wuthering Heights] silent.
adjective habitually reserved and uncommunicative
[SAT terms] habitually reserved and uncommunicative[PSAT glossary] habitually reserved and uncommunicative