od + Genitive

The preposition od translates to 'from' or 'since' and always requires the genitive case. It is a high-frequency word used constantly in everyday Czech.

1. When to use od:

• People: It is mandatory when you receive something from someone (dárek od bratra) or when you are leaving a person's presence (jdu od lékaře).
• Time: It marks the starting point of a time span, often paired with do + genitiv (od pondělí do pátku) or meaning 'since' (od ledna).
• Space and Distance: It expresses movement away from a general vicinity, or physical distance (kousek od Prahy).
• Authorship and Brand: It indicates the creator of a work or the brand of a product (písnička od Gotta, auto od Fordu).
• Purpose and Belonging: It connects an object to what it belongs to or is used for, often where English uses 'to' or 'for' (klíč od auta - car key, heslo od wifi - wifi password). It can also express cause or physical state (špinavý od bláta - dirty from mud).
• Verbs with od: Certain high-frequency verbs naturally pair with od, such as koupit od někoho (to buy from someone), půjčit si od někoho (to borrow from someone), lišit se od (to differ from), and očekávat od (to expect from).
• Reciprocal phrases: The phrase od sebe means 'from each other' (e.g., Jsme daleko od sebe - We are far from each other).

2. The difference between od and z:
Learners often confuse od with z/ze + genitiv. Remember that z means 'out of' an enclosed space (like a building or box), while od means 'away from' a person or general area. You walk out of a hospital with z nemocnice, but you leave the doctor's office with od lékaře. For spatial movement and people, the exact opposite of od is k/ke + dativ (towards).

3. Pronunciation (Vocalization):
To make pronunciation easier, od changes to ode before certain consonant clusters (like dn- or dv-, e.g., ode dneška - from today, ode dveří - from the door), and before the pronoun 'me' (ode mě - from me).