From an unused root meaning to hold firmly; the bosom (as comprised between the arms) -- bosom.
H2683. chetsen
[חֵ֫צֶן] noun masculine bosom of a garment (Arabic , Ethiopic also Syriac bosom (= *), see HoffmZMG 1878, 753 LagM ii. 361 ff.; BN 46 f.; on this word and following see BaNB 120; ZMG 1889, 183) — מְעַמֵּר וְחִצְנוֺ קוֺצֵר כַמּוֺ מִלֵּא שֶׁלּאֹ Psalm 129:7 (grass) with which a reaper filleth not his hand, nor a binder his bosom.