词根词缀：com-, co-, cog-, col-, con-, cor-

【来源及含义】Latin: together, together with, with

【相关描述】The prefix com- is assimilated to co- before h, w, and all vowels:

The prefix com- becomes, cog- before g: cognition, [co + gnoscere, "to know"], et al.

The prefix com- becomes, col- before l: colloquial, et al.

The prefix com- becomes, con- before c, d, g, j, n, q, s, t, v: covivant, et al.

The prefix com- becomes, cor- before r: corrigible, et al.

【相关词根词缀】 Related "together" units: greg-; inter-; struct-.

【同源单词】abscond, abscondee, anticorrosive, bioconcentration, coadjutant, coadjuting

词根词缀：galvano-, galvan-

【来源及含义】Named after the Italian physician and physicist who investigated the nature and effects of what he conceived to be electricity in animal tissue; who in 1762 discovered and first described voltaic electricity; electric currents; and primarily, direct electrical current.

【相关词根词缀】 A cross reference of word units that are related, directly and/or indirectly, with "electricity": electro-; hodo-; ion-; piezo-; -tron; volt; biomechatronics, info; mechatronics, info.

【同源单词】electrolysis, Galvani, galvanic, galvanic battery, galvanic corrosion, galvanic couple

词根词缀：tang-, tact-, tast-, ting-, -tig -tag, -teg-

【来源及含义】Latin: touch, feel; try; reach; handle; evaluate, estimate

【同源单词】anticontagious, atactilia, attain, attainable, attainder, attainment