PCS

*nagd- - bosom, breast (SED I No. 195)

Problematic; scarce attestation in Arb. and Eth. only. 

Hebrew
nägäd - that which is opposite, that which corresponds; in front of, before (HALOT 666)

It is likely related with a common meaning shift. 

Arabic
naǯd- - udder (BK 2 1201)

Cf. also naǯūd- ‘who has a long neck (camel, donkey, etc.)’ and minǯad- ‘adornment of the woman’s neck, necklace ... going down to the bottom of the breast’ [BK 2 1201-1202]. 

Geez
ˀəngədˀā (ˀəngədˁā) - breast, chest (CDG 29)
Tigrinya
ˀəngədˁā - back, spine (Bass. 537)

Tna. ­-ˁ- shows that the «correct» laryngeal in Gez. is not -ˀ-­ but ­-ˁ-­.